Perching duck

（重定向自Cairinini）

The perching ducks ("Cairininae" or "Cairinini") were previously treated as a small group of ducks in the duck, goose and swan family Anatidae, grouped together on the basis of their readiness to perch high in trees. It has been subsequently shown that the grouping is paraphyletic and their apparent similarity results from convergent evolution, with the different members more closely related to various other ducks than to each other.

单词	Cairinini
释义	Cairinini 英语百科 Perching duck （重定向自Cairinini） The perching ducks ("Cairininae" or "Cairinini") were previously treated as a small group of ducks in the duck, goose and swan family Anatidae, grouped together on the basis of their readiness to perch high in trees. It has been subsequently shown that the grouping is paraphyletic and their apparent similarity results from convergent evolution, with the different members more closely related to various other ducks than to each other.
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