Beaver A colony of beavers will protect its territory against intruding colonies. Also, all members will share responsibility in repairing a den. The beaver is about 3 feet long, tip to tail, and can weigh 90 pounds. This famous builder of dams does not hibernate and spends most of its time in the lodge. The beaver's ever-growing front teeth enable it to gnaw on food and trees continuously.
Beavers live in about half of all the counties of Illinois.
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