A couple more pix of the wonderfully confiding Baikal Bush Warbler at Telford Gardens.
The key features to separate this from the very similar Spotted Bush Warbler (which is yet to occur in Hong Kong) are the broad white (vs narrow white) tips to the under tail coverts and the slightly more pointed wing, with emarginations on just two flight feathers instead of three.
A paper explaining the difference between the species can be found here:
http://www.thaibirding.com/ornithology/spotted-bush-warbler.htm
Cheers
Mike