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Biology

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The main foodplants of the caterpillars are cuckooflower (Cardamine pratensis), and garlic mustard (Alliaria petiolata); although a range of other members of the crucifer family are used (2). A single generation is produced each year (3); adults usually fly between mid-April and mid-June (2), and females lay eggs singly during May or June on the flower heads of the foodplants (3). The eggs, which are white at first, turn orange after 2-3 days, and are easy to spot (2). It is very rare to find more than one egg on a flower; studies have shown that females mark the flowers on which they have laid an egg with a pheromone, and other females are deterred from laying there as a result. This ensures that each larva has sufficient food in its early stages (2). During June and July (3) the caterpillars feed on the developing seeds in the flowers (2), they are also reported to be cannibalistic; if more than one egg is laid on a plant, this cannibalism gives one caterpillar an advantage, as it eliminates the competition (2). Caterpillars pupate in July (3) on tall vegetation near the foodplant (2), where they spend the winter as a pupa. The adults typically emerge the following May (3), although it has been discovered that in captivity, emergence can be delayed for up to two years, which may prevent an adult facing unsuitable conditions (2).
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Conservation

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No conservation action is targeted at this widespread species.
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Description

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Only male orange-tip butterflies actually have orange tips to their forewings; females have black or greyish wing tips (1). In both sexes, the undersides of the hindwings have a dappled pattern of yellowish-black scales, which provides good camouflage when the butterfly is at rest amongst vegetation (2). The caterpillar reaches 3 cm in length, and is pale bluish- or greyish-green with white sides. The whole body is peppered with fine black spots (3).
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Habitat

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Found in a variety of grassy, damp habitats, including meadows and road verges (2).
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Range

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This resident species has a wide distribution in the southern half of Britain. In the late nineteenth and early twentieth centuries, this butterfly was lost from many areas of Scotland. Since the 1940s, however, the orange-tip has extended its range. It also occurs throughout Ireland, much of Europe, reaching north to central Scandinavia, and extends through the Middle East and temperate Asia, reaching Japan. At present, this butterfly is spreading northwards in Europe (2).
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Status

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This widespread species is not threatened. It is not listed under any conservation designations.
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Threats

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Not currently threatened.
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Brief Summary

provided by Papillons de Jardin
On repère facilement le mâle de l'Aurore lorsqu'il vole à la recherche des femelles, exhibant les taches orange de ses ailes avant. Observation en vol : Avril à juillet. Nombre de générations par an : 1. Milieux de vie : Prés marécageux, bordures de haies, lisières des bois. Description Adulte Envergure : 40-50 mm. Apparence : Le mâle et la femelle sont quasiment semblables. Le mâle est blanc crème avec deux grosses taches bien reconnaissables, orange vif, au bout des ailes avant. Chez la femelle, il n'y a pas de tache orange sur le dessus des ailes mais on peut repérer une tache grisâtre à noirâtre à la même place, ainsi qu'un point noir, plus étendu que chez le mâle. Le dessous des ailes est, chez le mâle comme chez la femelle, blanc marbré de vert.
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Life Cycle

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L'oeuf est en forme de fuseau côtelé, pointu aux deux bouts. Il est d'abord de couleur jaune puis rougit. Les oeufs sont pondus isolément sur la face supérieure des plantes hôtes. Chenille Taille : 28-32 mm au dernier stade. Apparence : La chenille est cylindrique, de couleur vert bleuté, mouchetée de petits points noirs qui changent progressivement de teinte pour devenir blancs sur les côtés. La région ventrale est vert foncée. Plantes hôtes : Les crucifères comme l'alliaire, la moutarde, la cardamine, le sisymbre, le cresson, l'arabis. Chrysalide: La chrysalide est anguleuse, de couleur brun clair avec une simple bande blanche s'étirant de bout en bout. À l'extrémité de la chrysalide, on observe un long appendice en forme d'épine. Elle est accrochée à son support par un fil de soie.
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Anthocharis cardamines

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Anthocharis cardamines, the orange tip, is a butterfly in the family Pieridae, which contains 1100 species of butterfly. A. cardamines is mainly found throughout Europe and temperate Asia (Palearctic)[2] The males feature wings with a signature orange pigmentation, which is the origin of A. cardamines' common name.[3]

Males and females of this species occupy different habitats: males mostly frequent the edges of forests whereas females frequent meadows. A. cardamines feeds on most plants found within its habitat but the females selectively oviposit on young inflorescence of crucifers.

Mating is usually controlled by females as virgin females found in flight are always pursued by males immediately.[4] Female behavior of using their abdomen can signal different meanings to the approaching males. There is evidence that mated females have an aphrodisiac and their usage of the abdomen has a closely related function in presenting these pheromones to males.

This species has also been affected by changing temperatures, and its first appearance has shifted forward 17.3 days in the Spring.

Description

The common name derives from the bright orange tips of the male's forewings. The males are a common sight in spring, flying along hedgerows and damp meadows in search of the more reclusive female which lacks the orange and is often mistaken for other species of butterfly. The undersides are mottled green and white and create a superb camouflage when settled on flowerheads such as cow parsley and garlic mustard (Alliaria petiolata).[3]

Males display a variation in body size, which is attributed to their host plant. Males reared on C. pratensis become the smaller of the two variants, and those reared on A. petiolata become the larger.[5]

Distribution and habitat

A. cardamines can be found throughout Europe and from temperate Asia to China.[2]

The habitats of males and females differ significantly.[6][7] Males are restricted to edges and clearings of forests for their entire lives. On rare occurrences, males will leave forest edges and enter meadows, but this is only to cross and reach another forest edge.[6] They prefer to fly in bright sunlight and avoid areas of shade in the forest.[6] Females are mainly found in open meadows and dry hillocks for a majority of their lives.[6] Females only spend short period of time in forests before reentering nearby meadows.[6] In Armenia the species inhabits not only forests and woodlands, but also meadows, where males occur together with females.[8]

Food resources

Female A. cardamines feed on the flowers listed above, in addition to all species of flowers located in the habitats where their host plants are found. They do not interrupt host plant search to find foraging habitats; instead, they visit available flowers in host plant habitats.[6]

Parental care

Oviposition

Females will tend to only deposit eggs on crucifers if they are in bloom.[6] Furthermore, they prefer to oviposit on young inflorescences, and there have been instances of A. cardamines that refuse to deposit eggs on inflorescences that had aged.[6] If the stem of the inflorescence is not strong enough to support the weight of the female A. cardamines, they will cease egg laying.[6]

Egg guarding

Initially, it was believed that the bright orange color of A. cardamines egg deterred further egg laying.[9] However, new studies have discovered another deterrent. To prevent other females from laying eggs on the same flowerhead, female A. cardamines will deposit a pheromone during egg laying.[9] This pheromone will deter other females from also laying an egg on that flower head.[9] Flower heads with more than one egg can still be found because the pheromone is water-soluble and relatively short-lived.[9]

Host plant learning and selection

When choosing host plants, female A. cardamines only lay eggs on host plants growing in the sun. Those in the shade are completely avoided, and plants partially covered in shade are only selected if the female does not have to travel through shaded areas to reach the plant.[9] Females are extremely selective for host plant size, and larger flower heads are preferred to smaller ones. Even when smaller flower heads are overly abundant, female A. cardamines will completely ignore them in search of larger flower heads.[9] Females will also ignore flower heads already containing a conspecific egg. This is because larva from the already laid eggs will hatch first and cannibalize any other present eggs.[9]

Life history

Life cycle

Egg

Eggs of A. cardamines are always deposited on inflorescences of crucifers. When first laid, eggs are a white pigment and eventually change to orange and then brown after a few days.[6] Eggs are also covered with a pheromone that detracts other females from ovipositing on the same crucifer.

Larva

When hatched, the larva consumes its egg shell before eating host plant and its seed pods. The fully grown larva leaves the food plant after its five larval instars and pupates on lower vegetation.[9] If more than one egg had been laid on the same host plant, then the larva to first hatch will cannibalize its sibling.[9] This is the major reason why Orange tip females avoid eggs laying on the same crucifer.

Pupa

While the earlier stages of A. cardamines are easy to find since most individuals develop on a single plant, the pupa is very difficult to locate.[9]

Migration

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Anthocharis in Seitz

Regional dispersal

In Britain, there have been patterns found relating weather and A. cardamines appearances. From data collected from 1976 to 1998, spring and summer temperatures were found to have increased by approximately 1 degree Celsius.[10] This has affected first appearance of A. cardamines, which has advanced by 17.3 days with the increasing temperature.[10] The increased temperature has also been to connected to increases in duration of flight period of A.cardamines in Britain.[10]

Enemies

Predation

Corpses of A. cardamines caterpillars are often found with darkening around a wound near the tail. These injuries are consistent with damage inflicted by spiders, which are their main predators.[9]

The host plants of A. cardamines are often grazed by Muntjac deer. The deer favor plants with young flowers, which corresponds to the preferred plants of A. cardamines for egg laying. As a result, Muntjac deer are responsible for consuming up to nineteen percent of A. cardamines young through indirect predation.[9]

Mating

Courting

The result of male courting depends heavily on the location of the female when courted. Females found in flight are immediately pursued by males, and the encounter almost always results in acceptance of the male mating attempt. When males encounter females already perched on vegetation, their mating attempts are usually met by a raised abdomen.[4]

Both mated and virgin females respond to males with a raised abdomen, but the signals take different meanings. When a male encounters a mated female with a raised abdomen, it is taken as a signal of rejection, and he quickly leaves. When virgin females raise their abdomen, the signal takes on a male detention function instead of rejection. Males will continue to court a perched, virgin female with a raised abdomen until she acquiesces or flees.[4]

Pheromone

While a specific pheromone has not been identified in A. cardamines, since both the rejection signal and detention signal in females are visually identical scientists hypothesize that a chemical signal distinguish the two. Mated females tend to track the males with their abdomens during the courting attempt, and this is behavioral evidence that mated females have an anti-aphrodisiac, and that the raised abdomen presents the pheromone as close as possible to the male.[4]

 src=
Side view of a male on Garlic mustard (Alliaria petiolata) in Ahlen, Germany

Subspecies

  • A. c. cardamines (Linnaeus, 1758)[11] – In the male of the name-typical cardamines the orange-red apical patch does not reach much further than to the black discocellular spot, the rest of the upperside being white with the exception of the narrowly lack apical margin, the proximal area of the forewing beneath and the underside of the hindwing being likewise white, the latter with greenish ("parsley") markings, which are rather variable in extent. In the female the orange-red apical patch is wanting, but the black apical marking is much wider and the black discocellular spot larger, otherwise the female similar to the male.
  • A. c. meridionalis (Verity, 1908)[12]
  • A. c. phoenissa (Kalchberg 1805)[13]
  • A. c. alexandra (Hemming, 1933) – Found in the mountain ridges of Northern Tian-Shan at elevations of 1200–2700 m. Flight period is April–July.[14]
  • A. c. isshikii – Distinct spot found both in pupae and adults and found in Japan.[15]

See also

References

  1. ^ "The IUCN Red List of Threatened Species". IUCN Red List of Threatened Species. Retrieved 26 April 2019.
  2. ^ a b Kudrna, Otakar (2011). Distribution Atlas of Butterflies in Europe. Gesellschaft für Schmetterlingsschutz e.V. p. 51. ISBN 978-3-938249-70-3.
  3. ^ a b Cott, Hugh (1940). Adaptive Coloration in Animals. pp. 74–75.
  4. ^ a b c d Wiklund C, Forsberg J (1986). "Courtship and male discrimination between virgin and mated females in the orange tip butterfly Anthocharis cardamines". Animal Behaviour. 34 (2): 328–332. doi:10.1016/S0003-3472(86)80100-2. ISSN 0003-3472.
  5. ^ Davies, W. James; Saccheri, Ilik J. (2013-02-01). "Maintenance of body-size variation and host range in the orange-tip butterfly: evidence for a trade-off between adult life-history traits". Ecological Entomology. 38 (1): 49–60. doi:10.1111/j.1365-2311.2012.01402.x. ISSN 1365-2311.
  6. ^ a b c d e f g h i j Wiklund, Christer; Åhrberg, Carl (1978). "Host Plants, Nectar Source Plants, and Habitat Selection of Males and Females of Anthocharis cardamines (Lepidoptera)". Oikos. 31 (2): 169–183. doi:10.2307/3543560. JSTOR 3543560.
  7. ^ R.L.H., Dennis (1982). "Observations on habitats and dispersion made from oviposition markers in north Cheshire Anthocharis cardamines (L.) (Lepidoptera; Pieridae)". Entomologist's Gazette. ISSN 0013-8894.
  8. ^ Butterfly Conservation Armenia. "State of Anthocharis cardamines in Armenia". Butterfly Conservation Armenia. TSE NGO. Retrieved 18 February 2018.
  9. ^ a b c d e f g h i j k l Dempster, J. P. (1997). "The Role of Larval Food Resources and Adult Movement in the Population Dynamics of the Orange-Tip Butterfly (Anthocharis cardamines)". Oecologia. 111 (4): 549–556. Bibcode:1997Oecol.111..549D. doi:10.1007/s004420050270. JSTOR 4221729. PMID 28308117.
  10. ^ a b c Roy, D. B.; Sparks, T. H. (2000-04-01). "Phenology of British butterflies and climate change". Global Change Biology. 6 (4): 407–416. Bibcode:2000GCBio...6..407R. doi:10.1046/j.1365-2486.2000.00322.x. ISSN 1365-2486.
  11. ^ "Rare Species of Insects in Anthropogenic Ecosystems Located in Southeastern Romania" (PDF). Natura Montenegrina. 12 (3–4): 673–686. 2013.
  12. ^ "Anthocharis cardamines". funet. Retrieved November 5, 2018.
  13. ^ Huseyinoglu, Yusuf. "A Faunistic Study on Papilonoidea and Hesperiodidea (Lepidoptera) of Murat Mountain in Banaz, USAK Province, Turkey". Pakistan Journal of Zoology. 45 (2): 437–445 – via researchgate.
  14. ^ Korb, Stanislav (2011). "A distributive list, biotope preferences and flight periods of butterflies of North Tian SHan" (PDF). Atalanta. 42 (1–4): 149–189.
  15. ^ Otaki, Joji M.; Ogasawara, Tsuyoshi; Yamamoto, Haruhiko (2005). "Morphological Comparison of Pupal Wing Cuticle Patterns in Butterflies". Zoological Science. 22 (1): 21–34. doi:10.2108/zsj.22.21. PMID 15684580.

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Anthocharis cardamines: Brief Summary

provided by wikipedia EN

Anthocharis cardamines, the orange tip, is a butterfly in the family Pieridae, which contains 1100 species of butterfly. A. cardamines is mainly found throughout Europe and temperate Asia (Palearctic) The males feature wings with a signature orange pigmentation, which is the origin of A. cardamines' common name.

Males and females of this species occupy different habitats: males mostly frequent the edges of forests whereas females frequent meadows. A. cardamines feeds on most plants found within its habitat but the females selectively oviposit on young inflorescence of crucifers.

Mating is usually controlled by females as virgin females found in flight are always pursued by males immediately. Female behavior of using their abdomen can signal different meanings to the approaching males. There is evidence that mated females have an aphrodisiac and their usage of the abdomen has a closely related function in presenting these pheromones to males.

This species has also been affected by changing temperatures, and its first appearance has shifted forward 17.3 days in the Spring.

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