Common Merganser:
https://www.allaboutbirds.org/guide/Common_Merganser/id
Grebe:
https://www.allaboutbirds.org/guide/Western_Grebe/id
• 谢谢!我去更正,也向网友 yirua 致谢! -奚凡- ♂ (0 bytes) () 08/20/2018 postreply 20:28:59