... 混合分型血清：pooled typing serum 婚羽：breeding plumage 婚色：nuptial colour ...
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Male in partial breeding plumage 雄鸟部份繁殖羽
·2,447,543篇论文数据，部分数据来源于NoteExpress
Because many spring birds are in their breeding plumage, it can be easier to identify them based on colors and feather patterns.
因为很多鸟在春天都换上了繁殖羽，根据颜色和羽毛图案来识别鸟种将变得更容易。
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