_why-are-some-birds-so-perfunctory-in-building-their-nests-preview-1.jpg "随便搭几根树枝就敢下蛋？为什么有的鸟筑巢能这么敷衍？Why are some birds so perfunctory in building their nests? from www 锝緝锟斤拷锟斤渐锞冨š Video Screenshot Preview 1")
Gallery_why-are-some-birds-so-perfunctory-in-building-their-nests-preview-3.jpg "随便搭几根树枝就敢下蛋？为什么有的鸟筑巢能这么敷衍？Why are some birds so perfunctory in building their nests? from www 锝緝锟斤拷锟斤渐锞冨š Video Screenshot Preview 3")
Gallery_why-are-some-birds-so-perfunctory-in-building-their-nests-preview-hqdefault.jpg "随便搭几根树枝就敢下蛋？为什么有的鸟筑巢能这么敷衍？Why are some birds so perfunctory in building their nests? from www 锝緝锟斤拷锟斤渐锞冨š Video Screenshot Preview hqdefault")
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