HKBWS Forum 香港觀鳥會討論區 - Powered by Discuz! Board

Subject: id help please [Print This Page]

Author: ac130 Time: 7/03/2012 21:54 Subject: id help please

2012-Mar-07, Yuen Long Park

Thank you very much.

Image Attachment: DSC06863_unknown_bird.jpg (7/03/2012 21:54, 147.26 KB) / Download count 411
http://hkbws.org.hk/BBS/attachment.php?aid=10882

Image Attachment: DSC06864_unknown_bird.jpg (7/03/2012 21:54, 142.94 KB) / Download count 395
http://hkbws.org.hk/BBS/attachment.php?aid=10883

Author: pitarhk Time: 7/03/2012 22:23

Besra

Author: ac130 Time: 7/03/2012 23:33

Dear pitarhk, thank you very much!

Author: brendank Time: 8/03/2012 00:29

Dark tail bars are narrower than the pale bars. This fits Japanese Sparrowhawk better.

Author: kkoel Time: 8/03/2012 00:35

Mesial stripe fits Besra: I'm starting to doubt the tail bar criterion which fits many birds alright but may be normally variable within Besras.

Author: Jonathmartinez Time: 8/03/2012 10:24

As does mesial stripe, even I agree this one is quite broad. If the feather that can be seen below the tail is a primarie, then this bird has a quite long projection that fit better for Japanese.

Author: brendank Time: 8/03/2012 14:33

I agree the primary projection does seem to fit Japanese better but the primaries are a bit obscured in the photo.

Author: HFCheung Time: 8/03/2012 19:38

I go for Besra. There is no way a male that is at least as old as a second winter to show such clear Mesial stripe. Also, I think the bars on the tail also fit Besra. They are very clear and the dark/light ratio is close to 1:1. In Japanese, they are not that clear and the dark/light ratio is close to 1:2.

HF Cheung

Welcome to HKBWS Forum 香港觀鳥會討論區 (http://hkbws.org.hk/BBS/)