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|Saturday 28th January 2006, 18:23||#1|
Natural Born Birder
Join Date: Oct 2005
Location: SW Norway
White-billed Diver / Yellow-billed Loon
Just wondering if any other BF users have ever seen Great Northern Diver (gavia immer) do a "head toss" or "throw" its head in flight in a similar manner to Red-throated Diver (gavia stellata). I have yet to experience this and have seen plenty of both species in flight.
White-billed Diver (gavia adamsii) do this quite regularly and I'm beginning to wonder if this may actually be a diagnostic feature.
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