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Warbler ID-29 - E. Iran

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Old Tuesday 1st June 2010, 06:35   #1
pacoraban
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Warbler ID-29 - E. Iran

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Old Tuesday 1st June 2010, 07:27   #2
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Looks like an Acrocephalus sp...
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Old Tuesday 1st June 2010, 08:44   #3
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Difficult without seeing the UTC's.....It looks shorter winged than longer...It could be Booted Warbler?....Would have to see the UTC's. If you have more images it would be helpful.

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Old Tuesday 1st June 2010, 09:12   #4
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Booted or Marsh !!
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Old Tuesday 1st June 2010, 10:44   #5
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Possibly Booted.

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Old Tuesday 1st June 2010, 13:48   #6
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...or Sykes's....

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Old Tuesday 1st June 2010, 14:10   #7
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...or Sykes's....

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Sykes's had crossed my mind but I've no experience with them.

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Old Tuesday 1st June 2010, 15:07   #8
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If the bird in question was 'proven' to be Hippolais v the UTC's. Then I believe a longer bill would have been more appropriate for Syke's than...as shown in the image.
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Old Tuesday 1st June 2010, 15:50   #9
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If the bird in question was 'proven' to be Hippolais v the UTC's. Then I believe a longer bill would have been more appropriate for Syke's than...as shown in the image.
Ken, in your experience, would you expect a Booted to have a more prominent rear supercilium? or dark tip to lower mandible? http://www.birds.kz/Hippolais%20cali...rgee.html?7&19

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Old Tuesday 1st June 2010, 19:01   #10
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Any help is highly appreciated
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Old Tuesday 1st June 2010, 19:03   #11
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Brian, in response to your question...I have extremely limited experience of the rarer unstreaked acro/hippo brigade. The very sight of a bland faced warbler always concentrates the mind, once Garden Warbler has been eliminated.

Clearly, I've not had your apparent experience concerning the 'latter'.

On a previous occasion I observed a BRW that according to text should have had the lower mandible diffusely tipped darker, which the bird did not have! Thus I call into question the absolute relevance of this cosmetic aid when dealing with scarce/rare bland migrants, prefering to address more fundamental issues...utc's, wing formula, overall cosmetics, behaviour(jizz)
vocal (if any) etc.

I've only ever seen one definite Booted Warbler, which I ascribed to the race caligata. This was due to the cosmetics/structure ticking all the boxes, with contrasting dark feet and a modestly sized bill....and lest I forget, observed at c8' from above.

If I may return the question....What's your opinion of the priority relevance, concerning diffusely tipped lower mandibles and the light-dependant extent of the rear supercillium...when your looking for a terminal clinch?

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Old Tuesday 1st June 2010, 20:25   #12
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I agree that it is a Sykes's or Booted Warbler. Compared with the acros, note the dark upper edge of the supercilium, the rounded head, the less strong bill and the greyish brown plumage. Like Brian hinted, Sykes's Warbler has on average a shorter supercilium, but some Booted Warblers may also show a short supercilium (at least on photos):
http://tarsiger.com/gallery/index.ph...49314&lang=eng

AFAIK Sykes's Warbler breeds in Iran, but Booted Warbler would be a passage migrant.
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Old Wednesday 2nd June 2010, 09:20   #13
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I agree that it is a Sykes's or Booted Warbler. Compared with the acros, note the dark upper edge of the supercilium, the rounded head, the less strong bill and the greyish brown plumage. Like Brian hinted, Sykes's Warbler has on average a shorter supercilium, but some Booted Warblers may also show a short supercilium (at least on photos):
http://tarsiger.com/gallery/index.ph...49314&lang=eng

AFAIK Sykes's Warbler breeds in Iran, but Booted Warbler would be a passage migrant.
As usual, I agree with CAU - from this single head-on image it is not possible to see any other features to help, perhaps Booted/Sykes's is right. However, my gut reaction on the bill shape (slim and seems to curve down), plus head pattern was Sykes's.....

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