Jonathmartinez

Hi Kevin,
This one looks also good for YB Bush Warbler, other option should be Brownish-flanked Bush Warbler, but the yellow washed on the undertails covert are diagnostic of this sp even not so easy to see on your pictures.
The song is unmystakable and is the best way to separate this 2 species.
You can find a record of its call (as well as its song) on the below link :

http://www.xeno-canto.org/browse ... ellied+bush+warbler

Cheers,

Jonathan

Jonathmartinez

Hi Kevin,

This two species are really not so easy to separate and first winter seems to have no difference on plumage. That the reason why it is often much better to rely on voice. Maybe comments from more experienced birwatchers could be welcome to have a better opinion on this ID.
I will not affirm that it is, but your call description also match well. Also it is located to higher elevation, in Hunan (where elevation are lower than in Sichuan) it is a bird that I always find only near the top of the peak above 1800 meter, and only in dense bambou thicket.

Cheers,

Jonathan