Spring_BB

西伯利亞銀鷗 Vega Gull
南生圍 (NSW) 28 JAN 2012

[ 本帖最後由 Spring_BB 於 2/02/2012 13:53 編輯 ]

Spring_BB

Please click here
http://www23.tok2.com/home/jgull/061209/mongolia.htm
See Individual 5 same case (Number of black-marked primaries 9+?)

Spring_BB

Quote:

原帖由 brendank 於 2/02/2012 11:39 發表
Due to the dark flecking on the primary coverts I think this is a third winter bird molting into its adult basic plumage.  The adult primary feathers have yet to fully attained therefore it is difficu ...

Thank you so much