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This is a list of snake species known to be found in the U.S. state of Illinois. [1] Concerns and listed statuses come from the Illinois Endangered Species Protection Board's February 2011 Checklist of endangered and threatened animals and plants of Illinois and the Illinois Natural History Survey's website. [1] [2]
Soon after feeding, close to the end of summer, the adult snakes return to their dens for winter hibernation. [4] The young snakes, around one-year-old, spend more time in marshy areas to find food before the winter temperatures arrive and hibernate there as their small size makes them unnoticeable to predators. [8]
Minimum length of individuals entering the reproductive cycle has been reported at 85–100 cm, which corresponds to sexual maturity age of about 4–6 years. Breeding occurs annually after hibernation in spring, typically from mid-May to mid-June. In this time the snakes actively seek each other and mating begins.
At which temperature do snakes hibernate? In the 60s °F: Snakes will begin moving toward hibernation sites. In the 50s °F and below: Snakes consistently stay in their places in the ground.
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Studies have indicated these snakes learn to improve their strike accuracy over time. [11] Many temperate species of pit vipers (e.g. most rattlesnakes) congregate in sheltered areas or "dens" to overwinter (brumate, see hibernation), the snakes benefiting from the combined heat. In cool temperatures and while pregnant, pit vipers also bask on ...
The City of Naperville Animal Control says there are 39 different species of snakes that live in Illinois, four of which are venomous. Luckily, the garter snakes invading Naperville are a ...