蹼

蹼(webbing)是一些半水生四足类动物在前肢或后肢指间长有的皮膜,功能是增加划水时手掌或脚掌的截面积,让這些動物能更有效率的进行游泳。常見的有蹼動物有水鸟(特别是游禽,包括鴨、鵝、鸥类、企鵝等)、蛙类、水獺、鴨嘴獸等。

一雙鴨子的蹼
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