Question

What is a large semi-aquatic rodent native to Canada, much of the United States, and parts of northern Mexico that constructs homes out of sticks, twigs, and mud in lakes or streams?

Answer 1

Beaver
The beaver is a large, primarily nocturnal, semiaquatic rodent. Castor includes two extant species, the North American beaver and Eurasian beaver. Beavers are known for building dams, canals, and lodges. They are the second-largest rodent in the world.