Those present in water that freezes solid, burrow into mud and plant debris to hibernate. Some water mites may temporarily do this as well. Mussels do not grow during the winter, yet they are sometimes seen active through clear ice. 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.