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Subject: [Hong Kong] id please [Print This Page]

Author: irsychan Time: 15/09/2014 00:09 Subject: id please

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

Image Attachment: id1.jpg (15/09/2014 00:09, 14.46 KB) / Download count 313
http://hkbws.org.hk/BBS/attachment.php?aid=19100

Image Attachment: id2.jpg (15/09/2014 00:10, 16.43 KB) / Download count 330
http://hkbws.org.hk/BBS/attachment.php?aid=19101

Image Attachment: id3.jpg (15/09/2014 00:10, 17.95 KB) / Download count 311
http://hkbws.org.hk/BBS/attachment.php?aid=19102

Author: ddavid Time: 15/09/2014 10:57

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 ]

Author: irsychan Time: 15/09/2014 13:24

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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