North American Beaverアメリカビーバー

Castor canadensisLC— Least Concern

The North American beaver is the continent's largest rodent, famous for building dams and lodges from branches, mud, and stones that reshape entire waterways. As a keystone species, its engineering creates wetlands that support a wide range of other wildlife. Once nearly wiped out by the fur trade, beaver populations have recovered substantially under conservation management and the species is classified as Least Concern.

North American Beaver (reference photo)
Photo: Ryan Hodnett / CC BY-SA 4.0 / Source / cropped

Species Data

Classification
Rodentia / Castoridae Source
Distribution
Native to North America from southern Alaska through Canada and the continental United States to northern Mexico, with introduced populations in Patagonia, Finland, and Karelia. Source

Did You Know?

  • The largest known beaver dam, discovered via satellite imagery in 2007 in Alberta, Canada, measures about 850 meters (2,790 ft) long. Source
  • As a keystone species, beavers create wetlands and ponds that boost biodiversity for aquatic plants, insects, fish, and birds. Source
  • Once numbering 100–200 million before the fur trade decimated the species, populations have rebounded to an estimated 10–15 million through conservation efforts. Source

Where to See This Species

13 facilities · 0 individuals

ノースサファリサッポロ (Nosusafarisapporo)Hokkaido

ノースサファリサッポロのWikipedia記事に飼育種として記載 Source

宇都宮動物園 (Utsunomiya Doubutsuen)Tochigi東北自動車道 宇都宮ICから約5分、駐車場は乗用車1,000台分が無料。

宇都宮動物園のWikipedia記事に飼育種として記載 Source

高知県立のいち動物公園 (Kouchi Kenritsu Noichi Doubutsu Kouen)Kochi土佐くろしお鉄道ごめん・なはり線「のいち駅」から徒歩20分またはレンタサイクル13分。

高知県立のいち動物公園のWikipedia記事に飼育種として記載 Source

札幌市円山動物園 (Sapporoshimaruyama Doubutsuen)HokkaidoOpened in 1951

札幌市円山動物園のWikipedia記事に飼育種として記載 Source

西海国立公園九十九島動植物園 (Saikaikokuritsu Kouen Kujuukushima Doushokubutsuen)NagasakiOpened in 1961

西海国立公園九十九島動植物園のWikipedia記事に飼育種として記載 Source

千葉市動物公園 (Chibashi Doubutsu Kouen)ChibaOpened in 1985

千葉市動物公園のWikipedia記事に飼育種として記載 Source

Toba AquariumMieOpened in 1955

鳥羽水族館のWikipedia記事に飼育種として記載 Source

東武動物公園 (Toubu Doubutsu Kouen)Saitama東武動物公園駅（西口）下車、徒歩10分（600m）またはバス約5分。

東武動物公園のWikipedia記事に飼育種として記載 Source

日立市かみね動物園 (Hitachishikamine Doubutsuen)Ibaraki常磐自動車道 日立中央ICから国道6号経由で約5分。

日立市かみね動物園のWikipedia記事に飼育種として記載 Source

飯田市立動物園 (Iida Shiritsu Doubutsuen)Nagano

飯田市立動物園のWikipedia記事に飼育種として記載 Source

浜松市動物園 (Hamamatsushi Doubutsuen)ShizuokaOpened in 1950

浜松市動物園のWikipedia記事に飼育種として記載 Source

Higashiyama Zoo and Botanical GardensAichiOpened in 1937

名古屋市東山動物園のWikipedia記事に飼育種として記載 Source

和歌山城公園動物園 (Wakayamajou Kouen Doubutsuen)Wakayama

和歌山城公園動物園のWikipedia記事に飼育種として記載 Source

Latest news

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Conservation Story

Conservation Status

IUCNではLC（低懸念）です。

Habitat

北アメリカの河川、湖沼、湿地。

Threats

  • 湿地の減少
  • 水質悪化
  • 捕獲圧

Conservation & Breeding Efforts

  • 湿地の保全
  • 個体群の管理
  • 水辺の生態系を伝える展示

Sources

ja.wikipedia.org

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FAQ

Why do beavers build dams?
Beavers build dams to raise water levels around their lodges, creating a safe, predator-resistant pond and easier access to food and building material. Source
How big can a beaver dam get?
The largest known beaver dam, found in Alberta, Canada via satellite imagery in 2007, stretches roughly 850 meters — more than half a mile long. Source
Do beavers eat fish?
No. Beavers are strict herbivores that feed on bark, twigs, and aquatic plants; despite their aquatic lifestyle, fish are not part of their diet. Source

Source: ja.wikipedia.org en.wikipedia.org