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[Hong Kong] id please

id please

Photos taken on 13 Sep 2014 at Mai Po
Identification please
Thanks a lot

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id1.jpg (14.46 KB)

15/09/2014 00:09

id1.jpg

id2.jpg (16.43 KB)

15/09/2014 00:10

id2.jpg

id3.jpg (17.95 KB)

15/09/2014 00:10

id3.jpg

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I think these are White-winged Terns. The second picture (and the third?) is of an adult moulting into non-breeding plumage. The black markings on the underwings and body are the remaining traces of the breeding plumage. The first picture is a juvenile (or adult in non-breeding plumage?).

[ Last edited by ddavid at 15/09/2014 11:30 ]

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Thank you, ddavid.
The second and third photos were taken from the same bird and following your advice, I have checked that the black marks on the body match very well the boundary between white and black colours of white-winged tern in breeding plumage.  Hence it should be white-winged tern moulting to non-breeding plumage as you advised.  
All photos were taken from the same flock of birds that flew over the bird hide on last Saturday.  

[ Last edited by irsychan at 15/09/2014 13:34 ]

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