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Old Friday 10th November 2017, 12:17   #1
Meerkat
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Pied Harrier or Marsh Harrier ? (Thailand/ Chiang Rai)

Pied Harrier or Marsh Harrier ? (Thailand/ Chiang Rai)
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Old Friday 10th November 2017, 16:16   #2
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Pallid Harrier has a very different pattern - so an Eastern marsh Harrier I belive.

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Old Friday 10th November 2017, 19:28   #3
Joern Lehmhus
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Jan, he asked for Pied harrier, not Pallid.

I have no personal experience of Pied, but couldn´t that also be possible???
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Old Friday 10th November 2017, 20:05   #4
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Quote:
Originally Posted by Joern Lehmhus View Post
Jan, he asked for Pied harrier, not Pallid.

I have no personal experience of Pied, but couldn´t that also be possible???
It looks good for adult male Eastern Marsh but after reading the Pied Harrier section in 'Birds of Prey of the Indian Subcontinent' I am confused as it might be Pied. Few pictures available but pattern of coverts seems better for EMH.
That said I do not have any experience with both and almost no literature by hand
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Old Saturday 11th November 2017, 08:07   #5
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looks good for female Pied Harrier, It has pale lesser covert as adult male Pied Harrier
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Old Saturday 11th November 2017, 14:30   #6
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Hi all,
this is conundrum. The problem is one of photograph interpretation not field Id. Xuky the paler grey feathers would show as such on the older black and white, marsh harriers, as well. Can see no structural constant except the pinions look broad as in EMH\swamp harrier. EMH seems to be the consensus?
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Old Saturday 11th November 2017, 16:38   #7
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Woops, I see that now, not Pallid but Pied. Pied and EMH are not always easy to identify. So are we still in the Emh camp

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Old Saturday 11th November 2017, 18:56   #8
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Yes, Pied and Eastern Marsh are not always easy to identify. The most problematic case is between adult female Pied and younger male Eastern Marsh. The main cause of the problem is the enormous variability of Eastern Marsh. And also that male EMH is smaller and slimmer than female and closer to Pied in that respect.

Compared to EMH, Pied is not so variable, and this makes things a little easier. This bird looks like quite typical adult female Pied to me. Compare, for example:

http://orientalbirdimages.org/search..._ID=&Location=

http://orientalbirdimages.org/search..._ID=&Location=

Eastern Marsh would show more uniformly brown covert area, as Xuky mentioned, and this bird also has a neat pale collar combined narrow brown crescent anterior to it and pale area just behind eyes. Also the general shape: small bill, round head combined with slim body, especially the rear.
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