澳大利亚和塔斯马尼亚的体毛浓密、水生小哺乳动物，嘴和尾宽阔，脚有蹼；鸭嘴兽科的唯一种类。
Small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet ; only species in the family ornithorhynchidae .
鸭嘴兽科