Look at the Black-throated Diver in transitional plumage in the front of the group. Size and structure recalling Pacific Diver. This bird is about 15% smaller than the other BTDs. But also you can see some typical BTD-characteristics. What do you think, which species it is? Comments are welcome. You can see another video on http://birdingbocks.blogspot.com/ (in German).
Link to this comment:
All Comments (0)