All Groundhog males are mostly bigger then females. Most Groundhogs live up to 4-5 years. In the autumn the Groundhogs get an extra layer of fat to keep them warm in the winter while hibernating. Groundhogs are also warm blooded. Illustrated by Alex C. Rodents are usually small mammals with sharp teeth that never stop growing.
Rodents use their teeth to chip away at their food.
There are over two thousand species of rodents including squirrels, rats, mice, and porcupines. Together they form Rodentia, which is the largest order of mammals. Within this large group the Woodchuck is considered one of the marmots. The warmer it is, the sooner the groundhog wakes up. The colder it is, the later the groundhog wakes up.