الأسماء في صفحات التنقل
Like other snakes, queen snakes use their sense of chemical perception (smell) to find prey and mates. They use their vision as well and are likely to be sensitive to vibrations. Aside from mating interactions, little is known about communication among queen snakes.
Communication Channels: chemical
Perception Channels: visual ; tactile ; acoustic ; vibrations ; chemical
Queen snake populations are considered stable throughout most of their range. Populations in the Great Lakes region and the Delmarva peninsula of Maryland seem to be declining as a result of habitat degradation, such as development along streams, rivers, and lakes, draining of wetlands, and pollution and siltation of aquatic systems.
US Federal List: no special status
CITES: no special status
State of Michigan List: no special status
IUCN Red List of Threatened Species: least concern
The eggs of queen snakes develop within the bodies of females, where they hatch. Females then give birth to live young.
There are no known negative effects of queen snakes on humans. Some fishermen kill queen snakes because they think they compete with them for fish. They misunderstand what crayfish eat.
Queen snakes are valuable members of the ecosystems they live in.
Queen snakes impact crayfish populations as specialist crayfish predators. They are also prey for many small to medium-sized predators.
Queen snakes eat mainly crayfish. They prefer to eat freshly molted crayfish to avoid ingesting the hard exoskeletons. Occasionally they take small fish and tadpoles. Queen snakes search for prey by swimming and searching under rocks and other underwater debris where prey are hiding. They use their powerful sense of chemosensation to find prey.
Animal Foods: amphibians; fish; aquatic crustaceans
Primary Diet: carnivore (Eats non-insect arthropods)
Queen snakes, Regina septemvittata, range from the southern Great Lakes south to the Florida panhandle and east through the Carolinas and north to southeastern Pennsylvania, New York, and the Georgian Bay in Ontario. These snakes are generally restricted to east of the Mississippi River, although there is a disjunct population in south-central Arkansas and Missouri. A third, small population of queen snakes occurs on Bois Blanc Island in Lake Huron.
Biogeographic Regions: nearctic (Native )
Queen snakes are semi-aquatic and are found near shallow, rocky rivers and streams, the edges of lakes, ponds, ditches, and canals, and in marshes. They are found in habitats with abundant crayfish. Preferred habitats are open or partly shaded. Queen snakes bask on rocks and logs along the water's edge or hang from tree limbs above the water. In the northern part of their range they hibernate in the burrows of crayfish or mammals.
Habitat Regions: temperate ; freshwater
Aquatic Biomes: lakes and ponds; rivers and streams
Wetlands: marsh ; swamp
It is not known how long queen snakes live in the wild. A captive lived for over 19 years.
Range lifespan
Status: captivity: 19 (high) years.
Queen snakes are colubrid snakes measuring 34 to 92.2 cm in total length. The dorsal surface is typically brownish or olive-colored. The species is distinguishable by a yellow band running horizontally down the sides and onto the labial scales. Younger individuals exhibit horizontal black bands on the dorsum. The ventral scales are bright yellow, with 4 brownish lengthwise stripes that converge towards the tail. Their scales are keeled and there are 19 dorsal rows at the mid-body. Queen snakes have rounded pupils. Unlike similar-looking garter snakes, queen snakes have a divided anal plate and lack a light dorsal stripe.
Range length: 34 to 92.2 cm.
Other Physical Features: heterothermic
Sexual Dimorphism: sexes alike
Queen snakes are preyed on by herons and raccoons. They may also be eaten by larger snakes, predatory fish, large frogs, hawks, otters, and mink. Small queen snakes may also be threatened by their crayfish prey if grabbed by their strong claws. Queen snakes are not aggressive but will bite if harassed and will smear their attacker with foul smelling secretions if grabbed.
Known Predators:
Anti-predator Adaptations: cryptic
Males find receptive females by using their tongues to sense chemical cues. If a female is ready to mate, the male aligns his body and vent with hers and copulation ensues.
Mating System: polygynous
Queen snakes breed in the spring, typically in May. They are a live-bearing snake species and give birth to 5 to 31 (usually 10 to 12) from August to September. Males and females reach sexual maturity at 2 years old, but its likely that females don't breed for the first time until they are 3 years old.
Breeding interval: Queen snakes breed once yearly.
Breeding season: Queen snakes breed in the spring, often in May.
Range number of offspring: 5 to 31.
Average number of offspring: 11.
Range gestation period: 90 to 120 days.
Average age at sexual or reproductive maturity (female): 2 years.
Average age at sexual or reproductive maturity (male): 2 years.
Key Reproductive Features: iteroparous ; seasonal breeding ; oviparous
Females expend significant energy in supplying their eggs with nutrients and gestating them. Once the young are born, however, females do not provide care.
Parental Investment: no parental involvement; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female)
