To further complicate the issue, I think the mottling/spotting on the flanks (shown well on one of the photos on the Shenzhen site) seems too well defined for either Black-throated or Red-throated Thrush. I wonder whether this indicates that the bird could be a hybrid between Black-throated and Naumann's Thrush (often considered a subspecies of Dusky Thrush, and previously recorded in HK).
There is a discussion of a probably hybrid Red-throated x Naumann's on the Birds Korea website:
http://www.birdskorea.org/Birds/ ... /BK-ID-Thrush.shtml
It would surely be useful to see more photos of the Pui O bird if these are available, especially if these show well the extent of streaking/mottling on the underparts and the pattern of the undertail coverts.
What on first sight appeared to be a fairly straight-forward addition to the HK list is starting to look very complicated for the Records Committee!
