Mammals:
* Woodchucks: These large rodents are commonly found in Oklahoma's grasslands and meadows.
* Ground squirrels: Several species of ground squirrels inhabit the state, including the thirteen-lined ground squirrel.
* Bats: Many bat species in Oklahoma, like the little brown bat, hibernate during the winter months.
* Skunks: Striped skunks, a common sight in Oklahoma, enter a state of torpor during the coldest months.
* Raccoons: These adaptable creatures often den up in the winter, though their hibernation isn't as deep as other animals.
* Black bears: While black bears aren't as common in Oklahoma as they are further north, they are present in the state's eastern regions and do hibernate.
Reptiles and Amphibians:
* Snakes: Certain snake species, like the garter snake, enter a period of brumation (a hibernation-like state for cold-blooded animals) during the winter.
* Lizards: Some lizard species, such as the fence lizard, can enter a state of torpor during cold weather.
* Turtles: Some turtle species in Oklahoma, like the snapping turtle, bury themselves in mud or under logs for the winter.
Note: Hibernation patterns and the exact species present can vary depending on the specific region within Oklahoma.