Emperor geese have two types of calls. The first (sounding like "kla-ha kla-ha") is mainly heard during migration when birds are grouped together in large numbers. The second type of call (sounding like "u-lugh u-lugh") occurs when birds are startled or threatened. These geese may also hiss when predators or other geese attempting to approach the nest. This hissing is often paired with a defensive posture or charging the threatening individual. This species of goose is known to be much less vocal than most other goose species.
Emperor geese rely mainly on their sense of sight to recognize predators or competitors. They also rely on sight to find food on land. When searching for mollusks, particularly underwater or in the mud, they primarily utilize their sense of touch. Like all birds, emperor geese perceive their environment through auditory, tactile, visual and chemical stimuli.
Communication Channels: visual ; acoustic
Perception Channels: visual ; tactile ; acoustic ; chemical
Between 1964 and 1986 the emperor goose population in Alaska dropped from around 139,000 to 42,000 individuals. The IUCN Red list states that reasons for this decline are poorly understood. While the population has more than doubled since 1986 and current populations remain stable to slightly decreasing, emperor geese are still at risk due to hunting practices and coastal oil pollution. It is also expected that climate change may limit breeding grounds, leading to a decline in populations as well. Due to climate change, emperor geese habitat may decrease by as much as 54% by 2070.
Management plans, such as the one suggested by the Pacific Flyway Council, stress that enforcing crackdowns in illegal hunting and egg collection as well as preserving habitat and educating the public about these birds, are essential steps in protecting emperor goose populations in Alaska.
US Migratory Bird Act: protected
US Federal List: no special status
CITES: no special status
IUCN Red List of Threatened Species: near threatened
There are no known adverse effects of emperor geese on humans.
While some adult geese are predated by foxes and eagles, juveniles are at a much higher risk of predation. Red foxes, arctic foxes, glaucous gulls, parasitic jaegers, golden eagles, snowy owls, mink, and sandhill cranes are all potential predators of both goslings and eggs. Local humans have also been known to hunt both young and adults as well as collect eggs for subsistence.
When a predator approaches the nest, brooding females hiss, raise their wings and take on a threatening posture. Males also guard the brooding female and nest by hissing, taking on a threatening posture or charging the predator. Adults without offspring also act as a decoy and lead predators away from the nesting sites. When not with eggs or very young juveniles, emperor geese usually flee to water when approached by predators.
Known Predators:
Adult emperor geese are small waterfowl averaging less than 3 kg and around 69 cm in length. They are sexually monomorphic with males averaging only slightly heavier than females. Emperor geese exhibit an entirely white head and nape of neck that often becomes stained a rust color by iron oxide present in a number of tidal ponds. Chin and throat are black with the rest of the body covered in gray plumage barred with black and white. Their beaks are short and light pink while their webbed feet are a bright orange. Tail feathers are white with black undertail coverts. Anser canagicus goslings are covered in downy gray feathers and usually have a black beak.
Average mass: 2.8 kg.
Average length: 68.5 cm.
Other Physical Features: endothermic ; homoiothermic; bilateral symmetry
Sexual Dimorphism: sexes alike; male larger
Conditions in the summer months determine whether or not juveniles will survive their first winter and migration. While the average lifespan of emperor geese has been recorded to be about 6 years with a maximum life expectancy of 12 years, many scientists believe that this is a gross underestimate. This is especially so because their longevity seems much lower than similar species. Estimated annual mortality rates range from 63 to 94% for adults.
Range lifespan
Status: wild: 12 (high) years.
Typical lifespan
Status: wild: 11 (high) years.
Average lifespan
Status: wild: 6 years.
Emperor geese roost along the coast during the non-breeding season. These areas include beaches, cliffs, and dunes as well as along reefs. Emperor geese select breeding grounds that are slightly further inland into lowland marshes and meadows near a water source such as a lake or riverbed. A nearby water source is crucial to survival as geese use them to flee from land predators. Nest sites are also found on vegetated mudflats and salt marshes. Within a week of hatching, A. canagicus goslings move into tidal marsh areas closer to the coast to grow.
Habitat Regions: temperate ; terrestrial
Terrestrial Biomes: tundra
Aquatic Biomes: coastal ; brackish water
Wetlands: marsh
Other Habitat Features: riparian
Anser canagicus is most commonly found along the Bering Sea. Main breeding populations are found in Arctic and subarctic Alaska, parts of Canada, as well as northeast Russia. They breed mainly around the Yukon-Kuskokwim Delta in Alaska. Most populations of emperor geese migrate to the Aleutian Islands during the winter.
Biogeographic Regions: nearctic (Native )
Emperor geese feed mainly on intertidal vegetation and marine invertebrates. Vegetation includes beach rye, crowberries, beach pea, and sandwort. They are also known to eat seaweed, eelgrass, and sea lettuce. While emperor geese may eat crustaceans, they mainly consume bivalves. During the spring and autumn months their diet consists primarily of blue mussels and macoma clams. They forage for these invertebrates by submerging their head underwater to find their prey. Another method of searching for prey called “puddling” occurs on mud flats. A goose creates pools in the flats by stamping its feet and then consuming the disrupted clams. Grasses, sedges and bulbs are eaten when these birds move inland during the nesting season.
Feeding is particularly important for goslings, which are one of very few vertebrates that obtain their protein necessary for growth almost entirely from plant matter. Studies have suggested that goslings may attempt to choose more protein rich plants and specifically prefer marsh arrowgrass (Triglochin palustris) when it is available and safe to access.
Animal Foods: mollusks; aquatic crustaceans
Plant Foods: leaves; roots and tubers; algae
Primary Diet: herbivore (Folivore )
Emperor geese are mainly herbivores, but also feed on mollusks and likely have a significant impact on their populations. It has been suggested that grazing actually increases growth of vegetation in the habitat, therefore likely benefiting many local organisms that utilize vegetation for food or cover. Nitrogen rich goose feces may also aid in vegetation growth. Adult, juvenile, and eggs of emperor geese are prey for local predators.
Emperor geese were hunted by subsistence hunters primarily in Alaska. Historically, eggs were collected during the laying season, while juveniles and adults were hunted in the spring. Emperor geese continue to be harvested today, but many recent hunting seasons have been closed due to low population numbers. Emperor geese are also sold as pets around the world.
Positive Impacts: pet trade ; food
Emperor geese exhibit a monogamous mating system, and will bond with a different goose only if the previous mate dies. Little is known about the formation of pair bonds but they are formed by the time breeding grounds are reached. Because copulation is rarely seen, it is assumed that mating occurs either just prior to or during migration to breeding grounds.
Mating System: monogamous
Upon arriving at the nesting grounds, females begin building nests. Eggs are normally laid within the first 10 days after arrival. Clutch size ranges from 3 to 8 eggs with an average of 5. Females incubate the eggs for 24 or 25 days, after which the goslings hatch over a 10 day period. Goslings hatched earlier in the breeding season have a much higher likelihood of surviving the following winter. Most goslings are fully feathered 30 to 47 days after hatching and are able to fly at 50 to 60 days old. Goslings remain close to their parents through the first winter and have even been noted to return to breeding ground with parents the following spring. Though young geese may return to breeding grounds early in life, most females do not lay eggs of their own until 3 to 4 years of age.
Emperor geese nests are commonly parasitized by other birds. A study conducted in the Yukon Delta breeding ground found that an average of 62% of nests had parasitic eggs. The majority of these eggs had been laid not by other species, but by other emperor geese. Females and males actively guard their nests but if a parasitic egg is successfully laid in or very close to a nest, the pair is highly likely to accept the egg.
Breeding interval: Emperor geese breed once yearly.
Breeding season: The breeding season occurs from late May to August.
Range eggs per season: 3 to 8.
Average eggs per season: 5.
Average time to hatching: 24 to 25 days.
Range fledging age: 50 to 60 days.
Average time to independence: 50 to 60 days.
Range age at sexual or reproductive maturity (female): 3 to 4 years.
Range age at sexual or reproductive maturity (male): 3 to 4 years.
Key Reproductive Features: iteroparous ; seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); sexual ; oviparous
Females are solely responsible for selecting a nest site, building a nest, and incubating the eggs. The same nest site may be used multiple years. Pairs chase rival goose species, members of their own species, as well as juveniles from previous seasons, away from their nesting sites. While both males and females defend the nesting area, males are much more aggressive than females. While the female is incubating, males remain close to the nest to fend off predators and other geese. By the end of the incubation period, females lose an average of 20.7% of their body mass due to energy being focused solely on incubating and protecting the eggs.
Once goslings hatch, they are brooded by females for the first 2 to 3 weeks. Goslings are able to forage within 24 hours of hatching. While the young feed, they stand between their parents who are both highly protective. If terrestrial predators approach and a body of water is nearby, the entire group flees to water. But if water is not close, parents surround their offspring while hissing and flapping their wings at the approaching predator. When an aerial predator strikes, juveniles hide beneath their mother’s wings as the father jumps at and attacks the predator. Males are even known to act as decoys, allowing the goslings and their mother to escape. Juveniles leave breeding grounds around the end of August but remain with their parents until the following spring, when they are chased away from the breeding grounds.
Parental Investment: precocial ; male parental care ; female parental care ; pre-fertilization (Provisioning, Protecting: Male, Female); pre-hatching/birth (Provisioning: Female, Protecting: Male, Female); pre-weaning/fledging (Provisioning: Male, Female, Protecting: Male, Female); pre-independence (Provisioning: Male, Female, Protecting: Male, Female); post-independence association with parents
Die keisergans (Anser canagica) is 'n gans wat in Alaska en Siberië voorkom.
Die wetenskaplike klassifisering van hierdie gans word tans betwis: sommige wetenskaplikes plaas dit onder die genus Chen, terwyl ander weer Anser verkies.
Beide geslagte het 'n identiese veredos, met 'n kenmerkende wit kop en agternek, met 'n donker grys hals en lyf. Die vere kan soms roesbruin voorkom, as gevolg van al die yster in die waters van hul verspreidingsgebied. Keiserganse is oor die algemeen nie aggressief nie en kan ook in groepe met ander watervoëls aangehou word.
Hul dieet bestaan hoofsaaklik uit waterplante soos alge en gras, maar hulle sal ook die lêkorrels van hoenders en eende vreet.
Keiserganse broei tussen Oktober en Januarie. Die nes word op die grond naby die water gebou, tussen gras of plante wat dit goed wegsteek. Die nes word met dons en vere uitgevoer. Die wyfie lê twee tot agt roomwit eiers wat na 24 tot 27 dae uitbroei. Die kuikens is self na twee tot drie jaar broeigereed.
Die keisergans (Anser canagica) is 'n gans wat in Alaska en Siberië voorkom.
Die wetenskaplike klassifisering van hierdie gans word tans betwis: sommige wetenskaplikes plaas dit onder die genus Chen, terwyl ander weer Anser verkies.
Beide geslagte het 'n identiese veredos, met 'n kenmerkende wit kop en agternek, met 'n donker grys hals en lyf. Die vere kan soms roesbruin voorkom, as gevolg van al die yster in die waters van hul verspreidingsgebied. Keiserganse is oor die algemeen nie aggressief nie en kan ook in groepe met ander watervoëls aangehou word.
Hul dieet bestaan hoofsaaklik uit waterplante soos alge en gras, maar hulle sal ook die lêkorrels van hoenders en eende vreet.
Keiserganse broei tussen Oktober en Januarie. Die nes word op die grond naby die water gebou, tussen gras of plante wat dit goed wegsteek. Die nes word met dons en vere uitgevoer. Die wyfie lê twee tot agt roomwit eiers wat na 24 tot 27 dae uitbroei. Die kuikens is self na twee tot drie jaar broeigereed.
Ar waz impalaerel(Daveoù a vank) a zo ur spesad evned palvezek, Chen canagica (Anser canagicus kent) an anv skiantel anezhañ.
Neizhañ a ra ar spesad e biz Siberia ha kornôg Alaska ; goaviñ a ra en un takad hag a ya eus Inizi an Aleouted da Ledenez Alaska[1].
a vo kavet e Wikimedia Commons.
Ar waz impalaerel(Daveoù a vank) a zo ur spesad evned palvezek, Chen canagica (Anser canagicus kent) an anv skiantel anezhañ.
L'oca emperadriu (Anser canagicus) o (Chen canagica) és un ocell de la família dels anàtids (Anatidae) que cria a estanys, llacs i altres zones humides de la tundra en Sibèria oriental, entre la Península de Txukotka i la zona d'Anadir, i en Alaska occidental, passant l'hivern en zones costaneres de les illes Aleutianes.
L'oca emperadriu (Anser canagicus) o (Chen canagica) és un ocell de la família dels anàtids (Anatidae) que cria a estanys, llacs i altres zones humides de la tundra en Sibèria oriental, entre la Península de Txukotka i la zona d'Anadir, i en Alaska occidental, passant l'hivern en zones costaneres de les illes Aleutianes.
Aderyn a rhywogaeth o adar yw Gŵydd frech (sy'n enw benywaidd; enw lluosog: gwyddau brych) a adnabyddir hefyd gyda'i enw gwyddonol Anser canagicus; yr enw Saesneg arno yw Emperor goose. Mae'n perthyn i deulu'r Hwyaid (Lladin: Anatidae) sydd yn urdd y Anseriformes.[1]
Talfyrir yr enw Lladin yn aml yn A. canagicus, sef enw'r rhywogaeth.[2]
Caiff ei fagu er mwyn ei hela.
Mae'r gŵydd frech yn perthyn i deulu'r Hwyaid (Lladin: Anatidae). Dyma rai o aelodau eraill y teulu:
Rhestr Wicidata:
rhywogaeth enw tacson delwedd Alarch gyddfddu Cygnus melancoryphus Alarch utganol Cygnus buccinator
Aderyn a rhywogaeth o adar yw Gŵydd frech (sy'n enw benywaidd; enw lluosog: gwyddau brych) a adnabyddir hefyd gyda'i enw gwyddonol Anser canagicus; yr enw Saesneg arno yw Emperor goose. Mae'n perthyn i deulu'r Hwyaid (Lladin: Anatidae) sydd yn urdd y Anseriformes.
Talfyrir yr enw Lladin yn aml yn A. canagicus, sef enw'r rhywogaeth.
Caiff ei fagu er mwyn ei hela.
Kejsergås (latin: Chen canagica) er en andefugl, der lever i det østlige Sibirien og det vestlige Alaska.
Taksonomi fra Wikispecies Kejsergås (latin: Chen canagica) er en andefugl, der lever i det østlige Sibirien og det vestlige Alaska.
Die Kaisergans (Anser canagicus) ist eine Art der Gattung Feldgänse (Anser) in der Familie der Entenvögel (Anatidae). Der Hauptteil der Population brütet im Yukon-Distrikt in Alaska. Ein kleinerer Populationsanteil findet sich im Nordosten Sibiriens. Sie unterscheidet sich von anderen Gänsearten durch ihre enge Bindung an die Meeresküste, wo sie brütet und sowohl im Sommer als auch im Winter Nahrung sucht. Anders als viele andere arktische Gänse brütet sie nicht in Kolonien, sondern verteidigt ihr Revier energisch gegen Artgenossen und andere Vogelarten.
Die Kaisergans wirkt gedrungener als andere Feldgänse-Arten. Ihre Körperlänge beträgt im Durchschnitt 66 Zentimeter.[1] Die Beine sind relativ kurz. Sie hat einen weißen Kopf und ein gesperbertes Gefieder. Beide Geschlechter sehen gleich aus. Die Männchen sind allerdings meist etwas größer als die Weibchen. Beide Geschlechter wiegen etwa 2,8 Kilogramm. In menschlicher Obhut gehaltene Kaisergänse können allerdings deutlich schwerer werden, da sie wegen des guten Futterangebotes zu Depotfettbildung neigen.[2]
Im Jugendkleid weisen Kaisergänse noch ein graues Mantelgefieder aus, das braun übertönt ist. Kopf und Hals sind durchweg schwarzgrau. Der Schnabel ist noch schwarz, während die Füße olivgrau sind.
Im 1. Jahreskleid gleichen die noch nicht geschlechtsreifen Gänse den Altvögeln. Allerdings ist die weiße Kopf- und Halspartie noch von einzelnen dunklen Federn durchzogen. Die Flügel weisen gleichfalls noch einzelne, noch nicht vermauserte Federn auf, die bräunlich sind. Schnabel und Füße sind zu diesem Zeitpunkt jedoch schon so gefärbt wie bei den Alttieren.
Die Vollmauser setzt ein, nachdem die Jungen geschlüpft ist. Sie dauert etwa einen Monat. Flugfähig sind sowohl die adulten Kaisergänse als auch die Junggänse etwa Ende Juli bis Anfang August.[3]
Die Kaisergans kommt von Nordsibirien bis zum Nordwesten Alaskas und auf den vorgelagerten Inseln des Nord- und Beringmeeres vor. Sie bevorzugt die Deltaregionen der Flusssysteme und brütet entlang der Küstenlinie. Brutplätze finden sich auch an küstennahen Binnenseen.
Die Vögel kehren erst in der zweiten Maihälfte – am Eismeer erst im Juni – an ihre Brutplätze zurück. Die Paare benötigen ein großes Brutrevier. Damit unterscheiden sie sich von einer Reihe anderer arktischer Gänse, die in Kolonien brüten. Das Brutrevier wird insbesondere vom Ganter heftig verteidigt.
Das Nest wird gewöhnlich an der höchsten Flutlinie zwischen angespültem Tang und Treibholz angelegt. Die Nester sind kunstlos aus trockenen Pflanzenteilen gebaut. Die Nester sind gut getarnt, da sie sich nicht über den Erdboden erheben. Brütende Kaisergänse haben außerdem die Angewohnheit, sich bei Gefahr mit ausgestrecktem Hals flach auf den Boden zu legen.[4] Die vier bis sieben weißmatten Eier werden gewöhnlich Anfang Juni gelegt und 25 Tage bebrütet. Mit dem Beginn der Brut lockert sich die Paarbindung. Die Ganter bilden in dieser Zeit Trupps und halten sich abgesondert von den brütenden Weibchen an der Uferzone auf. Pro Gelege werden meist nur zwei bis drei Jungtiere flügge. Ihre Geschlechtsreife erreichen Jungvögel frühestens gegen Ende des 2. Lebensjahres, in der Regel aber erst im 3. Lebensjahr.
Die Brutplätze werden gewöhnlich gegen Ende September und mitunter sogar erst im Oktober wieder verlassen.
Die Nahrung besteht zumindest für die Küstenpopulation überwiegend aus Weichtieren, Krustentieren, Ringelwürmern und andere Kleinlebewesen. Gräser, vorwiegend Seggen wie Carex stans werden von diesen Populationen nur in kleinen Maßen geäst. Auch bei Populationen, die in der Moortundra brüten, spielt die pflanzliche Ernährung nur eine geringe Rolle.[5]
Der Bestand beträgt 150.000 bis 200.000 Individuen.
Während der Zeit, in der die Kaisergänse flugunfähig sind, sind sie für den Menschen eine verhältnismäßig leichte Beute. Die Kaisergans spielt in der Ernährung der indigenen Völker ihres Lebensraumes deswegen eine Rolle. Ihrem Fleisch soll ein scharfer knoblauchartiger Geruch anhaften. Dies ist vermutlich auf ihre Ernährungsweise zurückzuführen.[4]
Die Kaisergans (Anser canagicus) ist eine Art der Gattung Feldgänse (Anser) in der Familie der Entenvögel (Anatidae). Der Hauptteil der Population brütet im Yukon-Distrikt in Alaska. Ein kleinerer Populationsanteil findet sich im Nordosten Sibiriens. Sie unterscheidet sich von anderen Gänsearten durch ihre enge Bindung an die Meeresküste, wo sie brütet und sowohl im Sommer als auch im Winter Nahrung sucht. Anders als viele andere arktische Gänse brütet sie nicht in Kolonien, sondern verteidigt ihr Revier energisch gegen Artgenossen und andere Vogelarten.
De Kaisergoos (Anser canagicus, ok: Chen canagica) is en Goos ut de Familie vun de Aantenvagels.
Düsse Goos is bit to 76 cm lang. Se hett en stebigen Lief. De Feddern sünd grau mit fiene Striepen, Kopp un Achtersiet vun'n Hals sünd witt, faken ok hellorange vunwegen veel Iesen in't Water. Gegen de wat blauere Sneegoos over is dat Witt nich dörtrocken bit to'n Ansatz vun'n Hals. Ganner un Goos verscheelt sik nich veel, man bi de Jungen hett de Kopp desülvige Farv, as dat Lief.
De Kaisergoos is minner sozial, as annere Göseaarden un blifft meist bi de Familie. Se brott nich in Kolonien un verdeffendeert ehr Revier gegen annere Göse. Freten deit se tomeist Planten.
De Eier weer an de Küst vun de Tundra leggt. En Nest besteiht meist ut dree bit seven Eier. Mit dat Ruden fangt de Kaisergöse an, wenn de Jungen ut'n Ei krapen sünd. Dat duert um un bi een Maand, bit se wedder flegen könnt. In düsse Tied sünd se for Minschen good to fangen. In de Länner, wo se bröden doot, speelt se for dat Een vun Indigene Völker vundswegen en Rull.
Up de Aardenlist vun de American Ornithologists' Union is de wetenschoppliche Naam Chen canagica, de List vun de International Ornithological Congress nömmt düsse Goos Anser canagicus.
Düsse Aart brott rund um de Beringsee to, in Alaska un in Kamtschatka. De meisten Vagels overwintert denn up de Aleuten.
De Weltpopulatschoon is in dat Johr 2009 up bi 100.000 Kaisergöse taxeert wurrn. De Tahl geiht achterut. De Grünn dorvun sünd nich düütlich. As dat utsütt, speelt de Jagd en Rull, man ok Eerdööl, wat in de See fleten deit, un wohrschienlich ok de Klimawannel. Vundeswegen steiht düsse Goos up de Rode List vun de IUCN unner „nich wiet af vun Gefohr“
. Mehr Biller, Videos oder Audiodateien to’t Thema gifft dat bi Wikimedia Commons. De Kaisergoos (Anser canagicus, ok: Chen canagica) is en Goos ut de Familie vun de Aantenvagels.
De Keizergoes (Anser canagicus) is in fûgel út de famylje fan de Einfûgels. Dizze goes is wat dûbelter as de oare guozzen, mei yn ferhâlding wat koarte poaten. De fûgels hawwe in wite kop mei in donkergrize hals. Fierder hawwe se grize fearren mei donkere en ljochtere streken.
De Keizergoes briedt rûnom de Bearing See. Yn Alaska oan de eastkant en yn Kamtsjatka oan de westkant. De fûgels oerwinterje meast op de Aleûten oan de súdkant fan de Bearingsee.
De Keizerguozzen komme healwei maaie, begjin juny yn harren briedgebiet oan. Der wurdt in nêst boud fan plantemateriaal wêryn 4-7 aaien lein wurde. Nei sa'n 25 dagen brieden komme de aaien út. Heal augustus geane de fûgels wer op wei nei harren oerwintergebiet.
De Keizergoes (Anser canagicus) is in fûgel út de famylje fan de Einfûgels. Dizze goes is wat dûbelter as de oare guozzen, mei yn ferhâlding wat koarte poaten. De fûgels hawwe in wite kop mei in donkergrize hals. Fierder hawwe se grize fearren mei donkere en ljochtere streken.
Үрүҥ моойдоох хаас (нууч. гусь-белошей, лат. Chen canagica) — кылгас модьу-таҕа моойдоох орто көтөр.
Улахана 2,5 киилэҕэ тиийэр. Атыыра тыһыта тас көстүүтүнэн уратылара суох. Көхсүн уонна кынатын түүтэ күөхтүҥү-сиэрэй, туора хара сурааһыннардаах. Төбөтө уонна моонньун кэлин өттө үрүҥ.
Ареала кыра. Беринг байҕалын арҕаа уонна илин кытылларыгар, Азия хотугуу-илин уһук өттүгэр уйаланар. Арассыыйаҕа Анаадыртан Беринг силбэһиитигэр диэри, арҕаа Халымаҕа көстөр. Маны таһынан Хотугу Америкаҕа Аляска кытылыгар уйаланар. Аҕыйах көтөр Командор уонна Куриил арыыларыгар кыстыыр. Саарыыр кэмигэр Сибэтиэй Лаврентий арыытын соҕуруу өттүгэр элбэх буолар.
Үрүҥ моойдоох хаас (нууч. гусь-белошей, лат. Chen canagica) — кылгас модьу-таҕа моойдоох орто көтөр.
Улахана 2,5 киилэҕэ тиийэр. Атыыра тыһыта тас көстүүтүнэн уратылара суох. Көхсүн уонна кынатын түүтэ күөхтүҥү-сиэрэй, туора хара сурааһыннардаах. Төбөтө уонна моонньун кэлин өттө үрүҥ.
The emperor goose (Anser canagicus), also known as the beach goose[6] or the painted goose,[7] is a waterfowl species in the family Anatidae, which contains the ducks, geese, and swans. In the winter, the emperor goose lives in mudflats and coasts in Alaska and occasionally Canada and the contiguous United States. In the summer, it migrates northerly several hundred miles to arctic and sub-arctic climates, where older individuals breed monogamously. Listed as near threatened by the International Union for Conservation of Nature, the species' population is declining due to threats such as pollution, hunting, and climate change.
The emperor goose was described in 1802 as Anas canagica. Its type locality is Kanaga Island, which is located in the Aleutian Islands, Alaska. The species has sometimes been classified in the genus Chen and less commonly in its own genus, Philacte.[8]
The emperor goose has a stout blue-gray body,[6] with spots of black and white, which cause it to have a "scaled appearance".[9] Its head and the back of its neck are white and tinged with amber-yellow;[7] unlike the snow goose, the white does not extend to the front of the neck.
The goose is also characterized by a black chin and throat, a white tail, a pink bill, which is tipped with white, and yellow-orange legs and feet.[7][10] The underside of the emperor goose's wings is gray, unlike the snow goose, which has black and white on the underside of its wings. The head of adults frequently turns to a reddish-brown color in summer, due to its feeding in tidal pools with iron oxide.[10]
Goslings (i.e. young shortly after hatching) are grayish-white colored; unlike adults, their bill is black. Goslings are also distinguished from adults by having gray, brown, or black feet and an area of white surrounding the bill for the first three weeks after hatching.
Juveniles (i.e. immature specimens older than goslings) are mostly gray colored, with a small amount of white on their feathers. Younger juveniles have a dark head and neck,[10] with their head being dusty-colored with patches of white.[7] However, after October, their head and upper neck turn to mostly white, although they still have scattered darker feathers. By the first winter, juveniles have the same coloring and features as adults.[10]
Adult males grow to a total length of 26–28 inches (66–71 cm) and females 25.6–27.5 inches (65–70 cm).
Other measurements in males, sampled from four specimens in Alaska and California, include a 2.5–2.98-inch (6.4–7.6 cm) tarsus (lower leg), a 1.42–1.6-inch (3.6–4.1 cm) bill, and a 13.5–15.5-inch (34–39 cm) folded wing. These measurements are similar in females, but females have a slightly shorter folded wing of 14.75–15.45 inches (37.5–39.2 cm) based on two Alaskan individuals.[11] The goose has a wingspan of 119 centimetres (47 in).[8] Because of its short wings, it flies slowly, requiring quick strokes.[10]
Males weigh between 2.766 kilograms (6.10 lb) and 3.129 kilograms (6.90 lb). They have a mean weight of 2.316 kilograms (5.11 lb), while females have a mean weight of 1.945 kilograms (4.29 lb).[8] The average weight of juveniles is 1.165 kilograms (2.57 lb) in males and 1.107 kilograms (2.44 lb) in females. Roughly 5–7.5 weeks after hatching, the goose averages a weight of 2.370 kilograms (5.22 lb) and 1.926 kilograms (4.25 lb) in males and females, respectively.[10] It has a heavy body and short neck compared to other geese.[12] Although the species can live to age 25 in captivity, it reaches age 12 in the wild.[13]
The emperor goose is migratory, traveling north in the summer to breed and south for the winter.[14] Unlike many goose species, which migrate thousands of miles, the emperor goose travels a few hundred miles for migration,[15] usually about 370 miles (600 km) to 470 miles (760 km).[8] Breeding birds molt near the breeding colonies, but geese unsuccessful with breeding move to either St. Lawrence Island or the Chukchi Peninsula to molt prior to the main southerly migration for winter.[16]
The breeding season starts in late June in Russia, but begins a few weeks earlier in Alaska, generally between 20 May and 3 June.[8] Only individuals three years or older will mate. A monogamous species, female emperor geese have a single mate throughout their life and only mate with any other male if their mate dies.[13] The species molts from late July to early August and leaves its breeding grounds later than any other species.[11]
The emperor goose breeds on tundra, building its nests in areas 10 miles (16 km) or closer to the coast.[14] The nests are typically constructed in marshes.[11] They are built as holes in the ground without containing nesting material, but are later built up with vegetation, such as leaves,[7] and feathers, which the female plucks from herself.[11]
The species usually lays 4–6 eggs, but it can lay anywhere from 2 to 8; eggs are often laid in the nests of other emperor geese families.[14] Eggs measure 7.86 centimetres (3.09 in) by 5.21 centimetres (2.05 in) on average, with an elliptical shape and a smooth shell. They are initially white colored, but become speckled with stains from their nest.[12] Egg incubation, usually lasting 24 days, is performed only by females.[14]
According to The Game Birds of California, a 1918 book, surveys of the species' nests showed that the male did not stay with the nest. However, the Beardsley Zoo says that although the male does not help build the nest, it defends it. The eggs hatch in late June and early July.[11] Exhibiting precociality, young are able to walk and swim hours after hatching,[14] as well as feed themselves. They typically vacate the nest the same day as their hatching, although they do not wander far from their parents until after two months.[13] Young can fly once 50−60 days old.[14] 10% of emperor geese remain alive after their first year.[13]
Individuals of the species usually only interact with their family; however, larger flocks collect during the breeding season and the molting season.[13] It is one of the most unsocial goose species; the only goose less social than it is the black brant.[11] It stays low when flying, usually keeping below 90 feet (27 m) above the ground and often coming close to touching the ground with its wings.[12]
In the summer, the species' diet consists of vegetation, such as shoots, roots, and berries, while in the winter it primarily eats bivalve molluscs (which it uses its sense of touch to catch)[13] and algae.[14]
Unlike other goose species,[10] its diet mostly consists of animals,[12] causing its flesh to have a strong flavor.[12] When living near water, it eats at the edge of water bodies, which has given it the name "Beach Goose".[6] If the species feels threatened, it goes into a body of water and swims away until the threat is a safe distance from it.[13]
Its vocalizations, according to Edward William Nelson, sound like "kla-ha, kla-ha, kla-ha",[12] and can be differentiated from those of other geese by having a more "nasal" sound.[8] It vocalizes less often than other geese, such as the white-fronted goose.[12]
During the summer, the emperor goose lives in Arctic and subarctic climates in the Bering Sea, around Alaska and a small part of northeast Russia.[17] Its habitats in this season include freshwater pools, inland lakes, and coastal lagoons.[13] 90% of specimens nest on the Yukon-Kuskokwim Delta.[15] In the winter, after its southerly migration, it lives primarily among the Aleutian Islands,[1] as well as on the Alaska Peninsula and the Kodiak Island.[15] It sometimes spends winters in Canada[1] and rarely as far south as northwestern California. Some areas in California the species has been found living in, as of 1918, include Humboldt Bay, Gridley, Davis, Rio Vista, Colusa County, Ingomar, Modesto, and Dixon.[11] Its habitats are mudflats and rocky shores in the winter,[14] in areas free of ice,[17] and tundra wetlands in the summer.[9] Its extent of occurrence is estimated to be 775,000 square kilometres (299,000 sq mi).[1]
As of August 2017, the emperor goose's population is increasing slowly.[18] In 1879, the emperor goose was found by Edward William Nelson to be abundant along the Yukon-Kuskokwim Delta.
In 1923, however, Arthur Cleveland Bent observed much fewer specimens, and reported that the population had decreased over the past 30 years prior to that. Bent said that "large numbers are killed each year and their eggs taken by the natives, even within the limits of what is supposed to be a reservation", which was a major reason for the goose's decrease in population.[12] In 1964, the goose's population was 139,000, which decreased to 42,000 in 1986.
The population subsequently increased,[6] with its population having been 85,000 in 2002 and over 98,000 in 2015;[19] According to the emperor goose's entry on the Red List of the International Union for Conservation of Nature (IUCN), which was entered on 1 October 2016, the total population of the emperor goose is decreasing.
However, it also said that the trend is not clear and it is increasing in parts of North America.[1] Julian Fischer, a wildlife biologist, said in a news article published in August 2017, that the population has been experiencing a slow, steady increase.
He stated that the population had over doubled in size from the early 1980s, and that it may be as large as 170,000.[18]
Although the reasons for the emperor goose's population decline are not well known, it is believed to be threatened by oil pollution, hunting, and climate change.[1]
Other factors contributing to the species' population decline include competing with the cackling goose for food and the preying of goslings.[10] The emperor goose is listed as near threatened on the IUCN Red List[1] and rated 14 out of 20 on the Continental Concern Score. The 2016 State of North America's Birds' Watch List, a list of threatened birds that have no major conservation actions taking place for them, includes the emperor goose.[19]
Due to its low population in the 1980s, recreational and subsistence hunts closed for the goose in 1986 and 1987, respectively. However, 30 years later, hunts became legal again after the population grew significantly. In 2015, the Alaska Migratory Bird Co-Management Council suggested for hunting of the bird to be allowed if the population were to grow to a certain number. On 2 April 2017, subsistence hunting was allowed for the emperor goose, with hunters able to kill an unlimited number of geese. In fall 2017, emperor geese were allowed to be hunted for recreational purposes by locals of Alaska with a permit, with a limit of one bird per person.
In 2018, hunters who were not residing in Alaska were permitted to hunt the geese with a permit. However, the species cannot be hunted anywhere in the contiguous United States.[15][18]
The emperor goose (Anser canagicus), also known as the beach goose or the painted goose, is a waterfowl species in the family Anatidae, which contains the ducks, geese, and swans. In the winter, the emperor goose lives in mudflats and coasts in Alaska and occasionally Canada and the contiguous United States. In the summer, it migrates northerly several hundred miles to arctic and sub-arctic climates, where older individuals breed monogamously. Listed as near threatened by the International Union for Conservation of Nature, the species' population is declining due to threats such as pollution, hunting, and climate change.
La Imperiansero aŭ pli longe kaj malfacile Imperiestransero (Chen canagica) estas specio de ansero. Ĝi reproduktiĝas ĉe la Beringa Maro, ĉefe en Alasko, Usono, sed ankaŭ en Kamĉatko, Rusio. Ĝi estas migranta, kaj vintras ĉefe en la Aleŭtoj.
La American Ornithologists' Union lokas tiun specion kaj la aliajn du “blankajn anserojn” de Nordameriko en la genron Chen, pli ol en la pli tradicia genro de "grizaj anseroj" nome Anser.
Tiu ansero (66 al 89 cm longa) havas fortikan grizan korpon, kun skvameca plumaro milde strieca per tre fajna nigrablanka strieco, pli malferma en dorso kaj pli densa en subaj partoj, kaj tre blanka kapo kaj malantaŭa kolo, ofte nuance al oranĝa pro ferriĉaj akvoj. Malkiel ĉe la blua morfo de la Neĝansero, la blanka koloro ne etendas al la antaŭa kolo, sed tiu montras tre klare limigitan nigrecan areon el la mentono tra la tuta antaŭa kolo, kiu nuancas al brusta strieco. La vosto estas blanka kaj kontrasta kun la ĝenerala griza korpo. La beko estas rozkolora en la supra makzelo kun helblua nuanco ĉebaze ĉe la vaksaĵo kaj malhela ĉe pinto (post antaŭfina blankaĵo) kaj en la suba makzelo. La piedoj kaj la kruroj estas tre oranĝecflavaj. Ambaŭ seksoj estas similaj, sed nematuruloj havas la kapon de sama koloro kiel la korpon.
Tiu specio estas multe malpli gregema ol plej anseroj, kutime loĝanta en familiaj grupoj. Ili reproduktiĝas en marborda tundro; la ino demetas 3–7 ovojn en surgrunda nesto.
Reproduktantaj birdoj plumoŝanĝas ĉe la reproduktaj kolonioj, sed nereproduktuloj moviĝas al la insulo Sankta Laŭrenco por plumoŝanĝi antaŭ la ĉefa migrado al la rokecaj marbordoj de la vintrejoj.
La manĝo de tiu ansero estas tipe komponita el marbordaj herboj kaj aliaj marbordaj plantoj. Tiele ties marborda prefero estas tialo ke tiu specio rare miksiĝas kun la aliaj anseroj. Tiu specio havas populacion ĉirkaŭkalkulata je 150,000 individuoj; kvankam ĝi ne estas aktuale konsiderata kiel minacata, ĝi estas ĉefe vundebla pro la klimatŝanĝo kaj pro eventuala katastrofo pro naftoverŝo en sia limigita teritorio.
La Imperiansero aŭ pli longe kaj malfacile Imperiestransero (Chen canagica) estas specio de ansero. Ĝi reproduktiĝas ĉe la Beringa Maro, ĉefe en Alasko, Usono, sed ankaŭ en Kamĉatko, Rusio. Ĝi estas migranta, kaj vintras ĉefe en la Aleŭtoj.
La American Ornithologists' Union lokas tiun specion kaj la aliajn du “blankajn anserojn” de Nordameriko en la genron Chen, pli ol en la pli tradicia genro de "grizaj anseroj" nome Anser.
El ánsar emperador[2] o ganso emperador (Chen canagica) es una especie de ave anseriforme de la familia Anatidae de inconfundible aspecto endémica de las costas circundantes al mar de Bering.
Se encuentra únicamente en el oeste de Alaska, las islas Aleutianas, isla Kodiak y la península de Kamchatka, en el extremo oriental de Rusia.
Tradicionalmente se incluía en el género Anser (Anser canagicus).[3]
El ánsar emperador o ganso emperador (Chen canagica) es una especie de ave anseriforme de la familia Anatidae de inconfundible aspecto endémica de las costas circundantes al mar de Bering.
Chen canagica Chen generoko animalia da. Hegaztien barruko Anatidae familian sailkatua dago.
Chen canagica Chen generoko animalia da. Hegaztien barruko Anatidae familian sailkatua dago.
Beringinhanhi (Anser canagica) on eräs hanhilaji.
Beringinhanhi on 66–85 senttimetriä pitkä. Linnun ruumis on siniharmaa ja suomukuvioinen. Pää ja niska ovat valkoiset, mutta kaulan etupuoli on musta. Jalat ovat oranssinkeltaiset.[2]
Beringinhanhia pesii Koillis-Siperiassa ja Alaskassa. Laji on havaittu joissain Euroopan maissa, mutta havainnot koskevat suurella todennäköisyydellä tarhoista karanneita yksilöitä.[2]
Chen canagica
L'Oie empereur (Chen canagica) est une espèce d'oiseaux aquatiques appartenant à la famille des Anatidae.
L'Oie empereur mesure entre 66 et 89 cm. Son plumage est gris écailleux sauf la tête, l'arrière du cou et la queue qui sont blancs. Les pattes sont orange.
Cette oie habite la toundra de l'Alaska et du nord est de la Sibérie, elle hiverne principalement dans les îles Aléoutiennes. C'est un oiseau qui fréquente surtout les milieux côtiers.
L'Oie empereur est peu grégaire et vit surtout en familles; sa préférence pour les zones maritimes fait qu'elle se mêle rarement aux autres espèces d'oies. La reproduction débute au mois de mars; le nid est généralement placé près de l'eau.
L'Oie empereur a une population estimée à 85 000 individus; bien que l'espèce ne soit pas actuellement considérée comme menacée, elle est particulièrement vulnérable aux modifications du climat et à une éventuelle catastrophe pétrolière dans son aire de répartition limitée.
Chen canagica
L'Oie empereur (Chen canagica) est une espèce d'oiseaux aquatiques appartenant à la famille des Anatidae.
L'oca imperatrice (Anser canagicus (Sevastianov, 1802)) è un uccello della famiglia Anatidae.[2]
Quest'oca ha il corpo grigio scuro, barrato leggermente con delle strisce sottili, e la testa e la parte posteriore del collo bianchi, spesso macchiati di arancio dalle acque ricche di ferro. Diversamente dal tipo blu dell'oca delle nevi, il bianco non si estende sul davanti del collo. I sessi sono simili, ma gli immaturi hanno la testa dello stesso colore del corpo.
Questa specie è molto meno gregaria della maggior parte delle oche, vivendo solitamente in gruppi familiari. Nidifica sulla tundra costiera, deponendo 3-7 uova in un nido sul terreno.
Gli uccelli nidificanti compiono la muta nei pressi delle colonie di nidificazione, ma gli esemplari che non nidificano si spostano sull'isola di San Lorenzo per cambiare piumaggio prima della migrazione principale verso le coste rocciose dei terreni di svernamento.
Il nutrimento di quest'oca è costituito soprattutto dalle erbe della linea di costa e da altre piante costiere.
Nidifica attorno allo stretto di Bering, soprattutto in Alaska, USA, ma anche in Kamčatka, Russia. È migratrice e sverna soprattutto nelle isole Aleutine.
Imperatoriškoji žąsis (lot. Anser canagicus, angl. Emperor goose, vok. Kaisergans) – žąsinių (Anseriformes) būrio paukštis.
De keizergans (Anser canagicus synoniem: Chen canagica) is een gans uit de familie Anatidae (Eendachtigen).
Deze 76 cm lange gans heeft een stevig grijs lichaam, subtiel gestreept met een witte kop en achternek, vaak lichtoranje vanwege het vele ijzer in het water. In tegenstelling tot de blauwachtige sneeuwgans is het wit niet doorgetrokken tot het begin van de nek. De geslachten zien er ongeveer hetzelfde uit, maar bij de jongeren heeft de kop dezelfde kleur als het lichaam.
De keizergans is minder sociaal dan de andere ganssoorten en blijft meestal bij de familie. Het voedsel is grotendeels plantaardig.
De eieren worden op de kust van de toendra gelegd en een nest bestaat meestal uit drie tot zeven eieren.
Op de soortenlijst van de American Ornithologists' Union is de wetenschappelijke naam: Chen canagica, de lijst van het International Ornithological Congress houdt het op: Anser canagicus.
De soort broedt rond de Beringzee, Alaska en in Kamtsjatka. De vogel overwintert voornamelijk in de Aleoeten.
De wereldpopulatie werd in 2009 geschat op rond de 100.000 exemplaren. Dit aantal neemt af. De oorzaken daarvan zijn onduidelijk, zowel jacht, als olievervuiling en klimaatverandering spelen daarbij waarschijnlijk een rol. Daarom staat deze gans als gevoelig op de Rode Lijst van de IUCN.[1]
Bronnen, noten en/of referentiesDe keizergans (Anser canagicus synoniem: Chen canagica) is een gans uit de familie Anatidae (Eendachtigen).
Keisargås (Anser canagicus) er ein gåseart. Tidlegare gjorde denne arten saman med snøgås (C. caerulescens) og eskimogås (C. rossii) ut for den biologiske slekta Chen. Mange autoritetar anerkjente ikkje Chen og desse tre artane blei i staden sett inn i slekta Anser.
Storparten av keisargåsbestanden hekkar i Yukon-distriktet i Alaska. Ein mindre populasjon finn vi i det nordaustlege Sibir. Denne arten skil seg frå andre gjæser med nære band til strandlinja, han hekkar nær stranda i sesongen og søkjer føde ved kystar året rundt.
Keisargjæser ser meir kompakte ut enn andre gåseartar. Kroppslengda varierer i området 66 til 89 centimeter, hannar veg i gjennomsnitt 2,3 kilogram, hoer rett under 2 kg. Dei forholdsvis korte beina er guloransje og nebbet er fleirfarga i gult raudt og med noko rosa, blått og grått. Fjørdrakta er lik hos kjønna med kvitt hovud og nakke, elles er ho spraglete grå.[1]
Ungane har gjennomført mørk grå fjørdrakt med marmorering på hovudet, men det kvite på hovudet og nakke kjem første hausten. Nebba er enno svarte, medan føtene er olivengrå.
Keisargåsa finst frå Nord-Sibir til nordvestre Alaska og har overvintringsstader på øyane i Aleutane, på Kamtsjatkahalvøya og i sørvestre Alaska.
Fuglane kjem til hekkeplassen mellom andre halvdel av mai og byrjinga av juni, i Russland opptil 3 veker seinare. Reira er godt kamuflerte, nede i ei senking i bakken. Mest vanleg er kullet på fem kvitmatte egg som rugast i 25 dagar. Polarmåse er den mest hyppige predatoren på ungane.
I hekkesesongen er dietten hovudsakleg planteføde, starr, bær, tang og algar, men òg blautdyr som blåskjel. Ungane vil oftast beite på mudderbankar med vegetasjon.[1]
Den globale populasjonen kan vere så liten som mellom 45 000 til 80 000 individ, og har vore sterkt minkande.[1] Arten er klassifisert som nær truga (NT) av IUCN.[2]
Wikimedia Commons har multimedia som gjeld: Keisargås Keisargås (Anser canagicus) er ein gåseart. Tidlegare gjorde denne arten saman med snøgås (C. caerulescens) og eskimogås (C. rossii) ut for den biologiske slekta Chen. Mange autoritetar anerkjente ikkje Chen og desse tre artane blei i staden sett inn i slekta Anser.
Storparten av keisargåsbestanden hekkar i Yukon-distriktet i Alaska. Ein mindre populasjon finn vi i det nordaustlege Sibir. Denne arten skil seg frå andre gjæser med nære band til strandlinja, han hekkar nær stranda i sesongen og søkjer føde ved kystar året rundt.
Keisergås (vitenskapelig navn Anser canagicus) er en fugl i andefamilien.
Denne ornitologirelaterte artikkelen er foreløpig kort eller mangelfull, og du kan hjelpe Wikipedia ved å utvide den. 
Multimedia w Wikimedia Commons Śnieżyca cesarska, gęś cesarska[5] (Anser canagicus) – gatunek dużego, wędrownego ptaka wodnego z rodziny kaczkowatych (Anatidae), zamieszkujący Amerykę Północną. Gniazduje (od V do VI − VII) na wybrzeżach Morza Beringa − Alaska, głównie delta Jukonu oraz na Kamczatce i Półwyspie Czukockim. Zimuje na Wyspach Aleuckich. Ptaki w wieku przedreprodukcyjnym (po raz pierwszy gniazdują w 3. roku życia) lato spędzają na Wyspie Św. Wawrzyńca.
Śnieżyca cesarska, gęś cesarska (Anser canagicus) – gatunek dużego, wędrownego ptaka wodnego z rodziny kaczkowatych (Anatidae), zamieszkujący Amerykę Północną. Gniazduje (od V do VI − VII) na wybrzeżach Morza Beringa − Alaska, głównie delta Jukonu oraz na Kamczatce i Półwyspie Czukockim. Zimuje na Wyspach Aleuckich. Ptaki w wieku przedreprodukcyjnym (po raz pierwszy gniazdują w 3. roku życia) lato spędzają na Wyspie Św. Wawrzyńca.
Kejsargås[2] (Anser canagicus) är en gås som lever kring Berings hav.[3]
Kejsargåsen har en kompakt grå, subtilt svartstreckad kropp. Huvudet, bakre delen av halsen och stjärten är vit. På grund av det järnrika vattnet i dess habitat färgas ofta huvudet orangebrunt. Till skillnad från den blå morfen av snögås så sträcker sig aldrig det vita till framsidan av halsen. Könen är lika, men juvenilen har grått huvud.
Kejsargåsen häckar i östra Sibirien och västra Alaska kring Berings hav och Kamtjatka. Den är en flyttfågel som främst övervintrar på Aleuterna men även till sydvästra Alaska och östra Kamtjatka.
Tidigare placerades arten i släktet Chen tillsammans med de andra nordamerikanska gässen snögås och dvärgsnögås. Genetiska studier från 2016 visar dock att arterna i Chen är inbäddade i Anser.[4]
Arten är mindre flockbenägen än merparten av alla andra gäss, och uppträder ofta i familjegrupper. Den häckar vid kusten av tundran och lägger 3–7 ägg i ett bo som placerar på marken. Häckande fåglar ruggar nära sin häckningsplats medan icke-häckande individer flyttar till St. Lawrence Island för att rugga, före huvudflytten till de klippiga kuststräckorna vid vinterkvarteren. Den lever främst av gräs som växer vid stranden och andra kustnära växter.
Internationella naturvårdsunionen kategoriserar arten som nära hotad.[1] Den tros ha minskat relativt kraftigt och anses fortfarande vara utsatt på grund av jakt och oljeutsläpp. I framtiden tror man att klimatförändringar kommer påverka artens bestånd negativt.[1] Världspopulationen uppskattas till cirka 85 000 par.[5]
Dess vetenskapliga namn canagicus härstammar från Kanaga som är en ö inom Aleuterna.
Kejsargås i flykten.
Kejsargås får ofta orangefärgat huvud på grund av de järnrika vattnet i dess habitat.
Kejsargåsens läte.
Museum specimen
Wikimedia Commons har media som rör kejsargås.
Kejsargås (Anser canagicus) är en gås som lever kring Berings hav.
Bering kazı[1] (Anser canagicus), ördekgiller familyasından Bering Denizi çevresinde Alaska ve Kamçatka’da üreyen ve kışları Aleut Adaları’nda geçiren göçmen kaz türü.[2]
Bering kazı Amerikan Ornitologlar Birliği tarafından Anser cinsinde değil, diğer Kuzey Amerika “beyaz” kazlarıyla birlikte Chen cinsinde Chen canagica olarak sınıflandırılır.
Bering kazı tıknaz bir gövdeye ve gri renkli tüylere sahiptir. Çok ince siyah şeritleri vardır. Başı ve boynunun arkası beyaz renklidir ve çoğunlukla demir zengin sular nedeniyle turuncu lekelidir. Kar kazının mavi versiyonunun aksine beyaz renk boynunun önüne kadar uzanmaz. Erkek ve dişinin renkleri aynıdır ama erişkin olmayan kuşların başları gövdeleriyle aynıdır.
Kazsılar ile ilgili bu madde bir taslaktır. Madde içeriğini geliştirerek Vikipedi'ye katkıda bulunabilirsiniz. Bering kazı (Anser canagicus), ördekgiller familyasından Bering Denizi çevresinde Alaska ve Kamçatka’da üreyen ve kışları Aleut Adaları’nda geçiren göçmen kaz türü.
Ngỗng hoàng đế, tên khoa học Chen canagica, là một loài chim trong họ Vịt.[2] Loài này sinh sản ở khu vực quanh biển Bering, chủ yếu ở Alaska, Hoa Kỳ, nhưng cũng có ở Kamchatka, Nga. Đây là loài di cư, nó trú đông chủ yếu ở quần đảo Aleut. Bộ lông màu có xám-xanh biển khi trưởng thành và phát triển chiều dài tới 66-71 cm. Cá thể trưởng thành có lông cằm và lông cổ họng màu đen, mỏ màu hồng, chân màu vàng cam và đầu trắng, thường chuyển sang màu nâu đỏ vào mùa hè.
Ngỗng hoàng đế, tên khoa học Chen canagica, là một loài chim trong họ Vịt. Loài này sinh sản ở khu vực quanh biển Bering, chủ yếu ở Alaska, Hoa Kỳ, nhưng cũng có ở Kamchatka, Nga. Đây là loài di cư, nó trú đông chủ yếu ở quần đảo Aleut. Bộ lông màu có xám-xanh biển khi trưởng thành và phát triển chiều dài tới 66-71 cm. Cá thể trưởng thành có lông cằm và lông cổ họng màu đen, mỏ màu hồng, chân màu vàng cam và đầu trắng, thường chuyển sang màu nâu đỏ vào mùa hè.
Гусь-белошей[2] (лат. Anser canagicus) — птица из семейства утиных.
Гусь-белошей — птица средней величины с короткой толстой шеей. Масса взрослой птицы около 2,5 кг. Самец и самка окрашены одинаково. Оперение спины и крыльев голубовато-серое с поперечными полосами чёрного цвета. Голова и задняя часть шеи белые. Горло и передняя сторона шеи бурые. Брюхо тёмно-серое, бока пепельно-серые с чёрными полосами. Ноги красноватые или оранжевые, клюв розовый.
Ареал гуся-белошея очень мал. Этот гусь гнездится на западном и восточном побережьях Берингова моря и на крайнем северо-востоке Азии. В России эта птица встречается от Анадыря до Берингова пролива и на запад до Колымы. Гнездится белошей также и в Северной Америке на побережье Аляски. Небольшое число птиц проводит зиму у Командорских и Курильских островов. На линьке особенно многочислен в южной части острова Святого Лаврентия.
В период линьки и заботы о птенцах встречается на морских побережьях с лагунами в сырой низкотравной тундре и в тундре с множеством солоноватых озёр. Гнездится в тундре с пресными водоёмами в местах произрастания пушицы. Реже гнездятся в долинах горных рек. Гусь-белошей молчаливая птица, редко подающая голос. Голос — громкий двухсложный крик, не похожий на гогот других гусей. В полёте часто взмахивает крыльями.
Гусь-белошей питается травами тундры, в основном пушицей и осоками.
Гнёзда строит по берегам солоноватых и пресных водоёмов, очень близко от воды. В кладке от 2 до 6 яиц. Срок насиживания составляет 23—25 суток. Через 43—45 дней птенцы встают на крыло.
Среди факторов, влияющих на снижение численности этих гусей — нефтяное загрязнение, гибель яиц и птенцов от песцов и чаек, браконьерство, а также высокая эмбриональная и постэмбриональная смертность молодняка в отдельные годы от неблагоприятных погодных условий как следствие существования вида на границе ареала. От браконьеров этот гусь страдает мало, так как не имеет охотничьей ценности из-за невкусного мяса.
Гусь-белошей (лат. Anser canagicus) — птица из семейства утиных.
帝雁（學名：Anser canagicus；英語：Emperor goose），是雁屬的一種鳥類，分佈于阿拉斯加附近。雄性體長在66～71厘米（26～28英寸）之間，雌性略小[3]。其種群數量一度由於石油污染等環境問題及人類捕殺而下降。非阿拉斯加居民在獲得許可後方可獵殺帝雁，但它在美國本土是嚴格禁獵的。[3]
帝雁（學名：Anser canagicus；英語：Emperor goose），是雁屬的一種鳥類，分佈于阿拉斯加附近。雄性體長在66～71厘米（26～28英寸）之間，雌性略小。其種群數量一度由於石油污染等環境問題及人類捕殺而下降。非阿拉斯加居民在獲得許可後方可獵殺帝雁，但它在美國本土是嚴格禁獵的。
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分類 界 : 動物界 Animalia 門 : 脊索動物門 Chordata 亜門 : 脊椎動物亜門 Vertebrata 綱 : 鳥綱 Aves 目 : カモ目 Anseriformes 科 : カモ科 Anatidae 属 : マガン属 Anser 種 : ミカドガン A. canagicus 学名 Anser canagicus (Sevastianov, 1802) 和名 ミカドガン 英名 Emperor goose ミカドガン（Anser canagicus）は、カモ目カモ科マガン属に分類される鳥類。
アラスカ州やチュクチ半島で繁殖し、冬期になるとカムチャツカ半島、アリューシャン列島、アラスカ湾へ南下し越冬する[1][2][3]。
通常日本には飛来しないが、1964年（昭和39年）～1965年（昭和40年）に宮城県仙台市東部の水田で日本初の観察例がある[4]。
全長66-89センチメートル[1]。翼長オス38-40センチメートル、メス35-38.5センチメートル[2]。頭部から後頸にかけての羽衣は白く[1][3]、前頸の羽衣は黒灰色[2]。胴体の羽衣は羽毛の外縁が白黒の暗青灰色で、白黒の鱗状に見える[1][3]。尾羽は白い[3]。
嘴は小型で、ピンク色[1][2][3]。後肢は橙色[1][2][3]。
繁殖形態は卵生。5-6月に沿岸から16キロメートル以内の場所に巣を作り、5個の卵を産む[2]。抱卵期間は24-25日[2]。
狩猟による生息数の減少が懸念されている[2]。
この項目は、鳥類に関連した書きかけの項目です。この項目を加筆・訂正などしてくださる協力者を求めています（ポータル鳥類 - PJ鳥類）。 
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