This is not a Besra, or indeed any kind of accipiter, but a Buzzard.
Looks a bit odd to me for Common/Eastern Buzzard, and white on upperwing, amongst other things suggests it could be Upland, but I have no real field experience of that species.
I haven't checked but assume 甘肅 is Gansu (province).
Mike Turnbull Author: countryboy Time: 9/12/2009 08:54
Why not Long-legged Buzzard? I just want to know the reason of it.I am a new birder from Guangzhou.