Crayfish remain active, but not as active as they are in the summer. They tend to burrow into wet meadows and banks. Leeches become dormant and bury themselves in mud or plant debris. Adult newts and mudpuppies remain active, while salamanders hibernate under logs and stones. Most frogs hibernate in the mud below the ice, though some survive the winter in their tadpole stage.
Many turtles also burrow into the mud and become inactive during the colder months.
Snapping turtles, on the other hand, settle beneath plant debris and logs or even stay in muskrat or beaver burrows. Both snapping and painted turtles become active sometimes, and can be seen crawling around under the ice. Mammals also overwinter in the frozen streams. Beavers make large mud and wood lodges that they stay in when the pond behind the dam freezes. Beavers keep their food underwater for the winter and have thick layers of fat and a dense coat of fur to protect them from the cold water.