Beavers form monogamous pairs and usually live in family groups of up to 8 related individuals called colonies. The younger siblings stay with their parents for up to 2 years, helping with infant care, food collection, and dam building.
>> Beaver families are territorial and defend against other families.
>> In order to warn family members of danger, beavers slap their tails against the water, creating a powerful noise.
>> Beavers are primarily crepuscular. They are only occasionally seen during the day. They usually wake at dusk and are also active at dawn.
>> The tails are one of the defining characteristics of beavers. They are broad and flat with large, blackish scales.
>> Another characteristic of beavers is their teeth. Like all rodents, beavers have large central incisors (front teeth) that are always growing. They must keep them trimmed by gnawing bark. MORE BEAVER FACTS HERE