Arctic ground squirrels are known to hibernate for up to 7 to 8 months in their burrows, enduring extremely cold temperatures.
Hedgehogs in colder regions can hibernate for several months, typically from late fall to early spring.
The common poorwill, a type of nightjar, is known for entering a state of torpor for months, especially during the winter months in some regions.
Chipmunks are known to hibernate for an extended period, with some individuals entering a state of torpor for up to six months.
Box turtles are known to hibernate for a significant portion of the winter, digging into the ground to protect themselves from the cold.
Certain species of bats, including the little brown bat, enter a state of torpor during the winter months, reducing their metabolic rate significantly.
Wood frogs are known for their remarkable ability to survive freezing temperatures.
Dormice in Europe are known to hibernate for several months, typically from late autumn to early spring.
Alpine marmots hibernate for about six months during the winter, relying on stored fat reserves to survive.
Groundhogs, also known as woodchucks, hibernate during the winter months, emerging in early spring.