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Warbler & raptor, Loei, Thailand (1 Viewer)

BKKBen

Well-known member
Hi again,

This warbler was seen at Phu Suan Sai NP, on April 14th - is it a Dusky?

The raptor was seen flying over a provincial arboretum (April 15th), about 60km south of the Laotian border. More so than my previous raptor post, these pics are probably not all that helpful, but the bird was watched heading south to north in a straight line, with a few shallow wing beats followed by a glide, repeated.

It appeared quite long-tailed and long-winged and relatively pale underneath, and my intial ID was a Eurasian Kestrel, though both Robson (and eBird) have this area being a little out of range for this species.

Thanks again for all assistance,

Ben.
 

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Pallid is a vagrant to Thailand and has only been seen in the south according to my copy of Robson.

Perhaps more likely is Pied, which is a regular passage migrant in NW Thailand.
 
Admitt I only checked the Species list for species recorded in Thailand... well, it's a Harrier. Difficult to say which based on these images.
 
The warbler looks better for Radde's to me, with fairly thick pink legs and what seems to be a short, thick bill (but hard to be sure on these photos).
 
I see what you mean about the thickness of the bill and legs on the warbler, but I'm not seeing a buff lower belly and vent. Maybe it would come out with adjustment for exposure.

Re the Harrier, can Eastern Marsh show such a large white rump?
 
The warbler looks better for Radde's to me, with fairly thick pink legs and what seems to be a short, thick bill (but hard to be sure on these photos).

Now that you brought Radde's up, the supercilium is indeed rather ill-defined in front of the eye and extends far to the nape... Probably the better candidate.
 
Good point raised by John, in the west we are more familiar with bright juveniles/1st-winters, spring adults are altogether duller by comparison. The structure however, clearly indicates the OP is Radde's.

Grahame

Thanks to all for the help. I originally didn't think Radde's because of the lack of colour on the undertail coverts, but I guess I should've also been looking at other features as well.

Thanks also re: the harrier. I'm not very familiar with harriers and didn't even think about that possibility. Regardless of species, it's the first harrier I've seen in Loei; I'll have to keep my eyes out for more next time I'm up there!

Thanks again. All help is greatly appreciated!

Ben.
 
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