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Subject: Pale Martin 灰沙燕 [Print This Page]

Author: sammysam Time: 22/04/2007 23:36 Subject: Pale Martin 灰沙燕

22/4/2007 Mai Po 米埔
Pale Martin 灰沙燕
scope + DSLR

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Author: jemi Time: 22/04/2007 23:42

:shock: scope + DSLR powerful combination!

Author: fforrest Time: 23/04/2007 00:57

Hi Sammy,

I think it should be a Pale Martin.

Please take a look of the comment by Paul LEADER one year ago.
http://www.hkbws.org.hk/cgi-bin/yabb/YaBB.pl?board=BirdingTips;action=display;num=1144158702

http://www.hkbws.org.hk/cgi-bin/yabb/YaBB.pl?board=Swifts_Swallows;action=display;num=1145366679

Regards,

Forrest

Author: sammysam Time: 23/04/2007 08:19

Thanks! Forrest.

Author: jemi Time: 23/04/2007 09:59 Subject: Riparia riparia

Oriental Bird Images
Riparia riparia diluta
http://www.orientalbirdimages.org/search.php?action=searchresult&Bird_ID=1745

中国鸟类图库
Riparia riparia
http://www.wwfchina.org/birdgallery/birdpic.shtm?booknum=878

中国野鸟图库
Riparia riparia
http://www.cnbird.org.cn/resust.asp?txtsearchstr=Riparia+riparia&Submit4=Go

Author: lpaul Time: 23/04/2007 11:24

Thanks for the links, but (as ever with photos on the net) be aware that many of these are misidentified, although is not surprising given the confused taxonomy of the Sand and Pale Martin complexes and the lack of references which deal with them in sufficent detail.

The easiest way to separate them is structure with Pale Martin having wings longer than the tail at rest and a very shallow fork to the tail (recalling Asian House Martin), whereas on Sand Martin the wings are about the same length (or shorter) than the tail at rest and the tail has a deep fork, rather like a juvenile Barn Swallow.

In general Pale Martin is the most widespread in China with three or four different and quite distinct subspecies occuring. Sand Martin would appear to be largely restricted to eastern China.

Author: cgeoff Time: 27/04/2007 12:41 Subject: cropping photos

Many of the photos on the site are crops from larger images. While this is perfectly understandable, and in most cases desirable, please could photographers be careful not to crop out parts of the bird. I've noticed this on a few occasions recently. In particular, the second of the martins above has had the tip of the tail cropped out, and it is not possible to see the full length. As Paul has pointed out, tail length is very important in identifying these birds (as well as a number of others).

Geoff

Author: sammysam Time: 27/04/2007 21:58

Geoff,

As the birds are nearly fit the whole frame, there are no cropping at the tail part of the original photos.

Sammy

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