北美水獭在阿卡迪亚国家公园游泳,美国 North American river otters in Acadia National Park, Maine, USA(© George Sanker/Minden Pictures)-立刻壁应

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北美水獭在阿卡迪亚国家公园游泳,美国 North American river otters in Acadia National Park, Maine, USA(© George Sanker/Minden Pictures)-立刻壁应

北美水獭在阿卡迪亚国家公园游泳,美国 North American river otters in Acadia National Park, Maine, USA(© George Sanker/Minden Pictures)-立刻壁应

  • 北美水獭
  • 美国区壁纸
  • 立刻壁应
  • 北美水獭在阿卡迪亚国家公园游泳,美国
  • © George Sanker/Minden Pictures

缅因州阿卡迪亚国家公园的水獭

今天照片里的是两只北美水獭,拍摄于阿卡迪亚国家公园。严格来说,这些别名“水狗”的水獭是黄鼠狼家族的成员。它们不只出现在河里,还遍布北美的水道和海岸。水獭眼睛近视,视力适合辅助游泳,因此它们有时会冲向人类或船只,可能并非故意,只是没看见。

它们全年都很活跃,不过大部分的活动都在夜间进行,主要是捕猎和进食。水獭是非常活跃的掠食者,通常捕食鱼类,但它们也吃水果、爬行动物、鸭子,甚至是罕见的海狸。水獭对污染非常敏感,因此往往会从污染地区消失。由于水獭体内会积累其生活环境当中的各种化合物,科学家将它们视为可靠的环境指示生物。

All going swimmingly. River otters in Maine, USA

These North American river otters are technically members of the weasel family and are not just locked into rivers. They can be found in waterways and along the coasts across North America – this pair are swimming in Acadia National Park in the US state of Maine - and have a tendency to come right up to humans or boats, usually within a few feet.

They’re active all year round, although they’re out and about mostly at night, hunting and eating. River otters are highly active predators, usually going after fish but they have been known to munch on fruit, reptiles, ducks and even the occasional beaver. River otters are highly sensitive to pollution, so will disappear from tainted areas.

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