akhan 21/04/2011 18:41
Grey Headed Yellow Wagtail
Correct me if i am wrong, is this Grey Headed Yellow Wagtail(Macronyx) taken at Tin Shui Wetland Park:
[IMG]http://farm6.static.flickr.com/5189/5639797197_d85c861de6_b.jpg[/IMG]
ajohn 22/04/2011 13:38
Yes, this is [i]macronyx[/i].
Note that the usual name for this subspecies is Manchurian Yellow Wagtail. Grey-headed usually refers to [i]thunbergi[/i] - this has not yet been recorded in Hong Kong but is possible here. It is almost impossible to separate from [i]macronyx[/i] though ([i]thunbergi[/i] is supposedly slightly less bright yellow, with narrower whiter wing bars, a very slightly different head pattern and a slightly shorter hind claw)