鸟类鸟类

in hive-180932 •  5 years ago 

鸟类是一群构成Aves类的温血脊椎动物，其特征是羽毛，无齿的喙颚，硬壳蛋的产卵，高代谢率，四腔心形和强壮而轻巧的骨骼。
PSX_20200403_215713.jpg

hive-180932
5 years ago by

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