irsychan

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

ddavid

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 ]

irsychan

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 ]