बीवर

Also known as Castor

Beavers (genus Castor) are large semiaquatic rodents of the Northern Hemisphere. There are two extant species: the North American beaver (Castor canadensis) and the Eurasian beaver (C. fiber). Beavers are the second-largest living rodents, after capybaras, weighing up to . They have stout bodies with large heads, long chisel-like incisors, brown or gray fur, hand-like front feet, webbed back feet, and tails that are flat and scaly. The two species differ in skull and tail shape and fur color. Beavers can be found in a number of freshwater habitats, such as rivers, streams, lakes and ponds. The

AI overview

Beavers are large, semiaquatic rodents found in the Northern Hemisphere, with two species: the North American beaver and the Eurasian beaver. They are easily recognized by their stout bodies, large chisel-like teeth, webbed feet, and distinctive flat, scaly tails, and they live in freshwater habitats like rivers, streams, lakes, and ponds.

AI-generated from the Wikipedia summary — may contain errors.

Species

Genus

PhylumChordata
ClassMammalia
OrderRodentia
FamilyCastoridae

Habitatfreshwater

河狸属（學名：Castor）是囓齒目河狸科的一属，也是河狸科存活至今的唯一一属，是世界第二大的囓齒動物（僅次於水豚），本屬现存兩種河狸，分別為美洲河狸（Castor canadensis）與歐亞河狸（Castor fiber）。河狸有「自然界水壩工程師」之稱。主要分布在美洲北部，至於歐洲和亞洲的分布則非常少。在北美洲，河狸的數量曾經超過 6 千萬頭，但在 1988 年僅剩下 6 百萬至 1 千 2 百萬頭。數量銳減的主因是狩獵，河狸的毛皮具有經濟價值，而牠們的腺體則能用來當作藥或是香水；另外，牠們會咬斷樹木以及建築水壩造成淹水，這些行為都會干擾人類的土地利用，因此該地區的河狸也會因此被人類獵殺。在歐洲，河狸受到聯合國的保護，在中國河狸被列為一級保護動物，並設有新疆布爾根河狸自然保護區。

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