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Common Tern (tibetana)

brendank

Brendan

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1# A A A Post at 22/04/2012 22:09  Show all

Common Tern (tibetana)

21 April 2012 - Southern Waters

I believe these are likely tibetana although Robson shows the bill as rather strongly bicolored (red base and black tip) for tibetana. Both Robson and Brazil state longipennis has reddish-brown legs so I am not sure leg color is enough for subspecific identification on these birds.



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brendank

Brendan

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2# A A A Post at 23/04/2012 21:30  Show all
There was this photo of the two presumed subspecies seen before. In this picture the difference looks rather marked.

http://www.hkbws.org.hk/BBS/redi ... 6&goto=lastpost

However, now that I see your photos of the terns from Russia it does seem that maybe the terns seen Saturday could be appropriate for longipennis. Perhaps the bird with dark legs seen before was an aberrant i]longipennis.

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