Male ducks respond to sexual competition by growing either an extra-long penis or a nub of flesh, a new study finds. The unusual phenomena occurred in two species studied: the lesser scaup (Aythya affinis) and the ruddy duck (Oxyura jamaicensis).
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- Block
- 770 458
- Time
- 2022-12-16T05:32:29Z
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- 1L3ZSNuHs9hKs5HKqz1zrxSGriLxbwVSnD
- App
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