アメリカ自然史博物館のインスタグラム(amnh) - 4月9日 10時19分


This diorama shows a July evening in Central Michigan. The beaver is not your typical rodent. It’s the largest one on the continent and the only one that can cut down mature trees. Beavers use the timber to build large, elaborate nests—dome-shaped lodges with underwater entrances— inside ponds. If there is no pond, beavers will create one by building a dam to block a stream. The resulting moat around their lodges keeps wolves, coyotes and other predators at bay. As semiaquatic rodents, beavers have closeable ears and nostrils, webbed hind feet and very dense fur coats. Their paddlelike tails appear to be covered in scales like a fish, but they aren’t. Rather, the skin is grooved in a scaly pattern, which makes the thick tail more flexible. #amnh #insideamnh


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