I think the white underwing flash is more restricted on Sooty, but is very white and should contrast strongly against a darker body.
我认为翼下白部分灰水剃鸟应围更小,而且与身体暗部分对比更明显。
I think the white underwing flash is more restricted on Sooty, but is very white and should contrast strongly against a darker body.
我认为翼下白部分灰水剃鸟应围更小,而且与身体暗部分对比更明显。
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