公鴨在交配期會換成繁殖羽，身上的羽毛白得發亮。過了交配期就會換成灰色的羽毛。母鴨全年就一套衣服

來源: 水行者於 2025-04-25 05:33:00 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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