Gull-billed Tern. Facial pattern, bill and width of wing fit well. Author: LIJO Time: 20/06/2013 20:50
Thank you very much HFCheung. So it is a juvenile bird as the top of the head not completely black!
This bird was very active and flew around. Author: ajohn Time: 21/06/2013 13:45
It's a winter-plumaged adult, not a juvenile. Possibly a first-summer bird that will not breed this year. Author: LIJO Time: 21/06/2013 18:00
Thanks ajohn.
Welcome to HKBWS Forum 香港觀鳥會討論區 (http://hkbws.org.hk/BBS/)