It's actually the same bird, it seems to be the only juvenile with darker breast.
Sorry, I have no idea how to identify this gull.
Gary Author: cgeoff Time: 1/04/2008 08:54
Vega Gull in its first winter can be identified in HK by the following features:
rather pale and uniformly-patterned greater coverts showing no moult contrast;
pale inner primaries visible in flight;
tail band that on average is slightly narrower than heuglini, and also, on average, rather browner;
slightly bulkier and shorter-winged structure than heuglini (not as marked as Slaty-backed in either respect);
late in the winter, relatively darker underparts and somewhat darker base to the bill.
The first two features should be visible on all birds, I believe, if only to rule out the possibility of hybrid origin. Not all the remaining features will necessarily be visible on all birds.
Geoff Author: cchristina Time: 1/04/2008 13:51
Also the pic of Vega Gull 1st Winter
Welcome to HKBWS Forum 香港觀鳥會討論區 (http://hkbws.org.hk/BBS/)
Image Attachment: vega gull 1st winter.jpg (1/04/2008 00:40, 0 Bytes) / Download count 1039
