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        Discussion Area 討論區 >> Photo Gallery 相片分享 I >>  Eastern Marsh Harrier 白腹鷂 Female 雌性 Inflight
        
(Message started by: Daniel CK Chan on Dec 9^th, 2003, 8:37pm)

Title: Eastern Marsh Harrier 白腹鷂 Female 雌性 Inflight
Post by Daniel CK Chan on Dec 9^th, 2003, 8:37pm

074 Eastern Marsh Harrier 白腹鷂
Mai Po Nature Reserve 米埔自然保護區
06/12/2003
10D+500IS+1.4x
http://www.danielckchan.com/b20030364.jpg
http://www.hkbws.org.hk/fileServer/PhotoG/daniel_chan01/danielchan_07.jpg
http://www.danielckchan.com/b20030365.jpg[/img]
http://www.hkbws.org.hk/fileServer/PhotoG/daniel_chan01/danielchan_08.jpg

Title: Re: Eastern Marsh Harrier (Female)澤鷂 (雌性)Infli
Post by sky4082 on Dec 9^th, 2003, 8:44pm

Excellent ! :D

Title: Re: Eastern Marsh Harrier (Female)澤鷂 (雌性)Infli
Post by 648 on Dec 9^th, 2003, 9:56pm

DANIEL兄：

口水流滿地！ ;D
貼一張隱沒在草叢前的一刻.
http://kite.center.kl.edu.tw/vbb/attachment.php?s=&postid=57089
http://www.hkbws.org.hk/fileServer/PhotoG/648/648_15.jpg

飛

Title: Re: Eastern Marsh Harrier (Female)澤鷂 (雌性)Infli
Post by Forrest FONG on Dec 9^th, 2003, 11:12pm

飛兄：

澤鷂在草叢前隱沒的一刻，時間及地點等重要資料也一起隱沒掉！ :o

Forrest

Title: Re: Eastern Marsh Harrier (Female)澤鷂 (雌性)Infli
Post by BERNARD on Dec 10^th, 2003, 1:30pm

Hi Daniel & Fei,

Are they photos of 2 different birds ? I notice that Fei's bird have greyish wing edges and black and white wing tips but is absent in Daniel's bird. ???

Bernard.

Title: Re: Eastern Marsh Harrier (Female)澤鷂 (雌性)Infli
Post by Paul Leader on Dec 11^th, 2003, 9:51am

Extremely useful and educational photographs. They do indeed show two different individuals which are a second-winter female and a second-winter male.

For sexing, the first bird is a relatively large, dark-bodied and very pale headed bird (= female) and the second a smaller looking bird with more contrasting plumage and a darker head (=male). It also has greyish central tail feathers.

Although they both look superficially like juveniles, a look at the moult pattern shows that they cannot be, as both have two different ages of primaries. They have moulted the outer five and retained the inner five juvenile feathers which are slightly browner and a little more worn.

The second bird is very interesting as is shows an underwing very similar to juvenile Pied Harrier, with the silvery grey underside to the primaries. However the body is not richly coloured, the secondaries should be barred on Pied (not uniformly dark) and the rump would be a brilliant white.

Please keep posting these photos of birds of prey, they really are very interesting.

Thanks,

Paul