
Photo: Mike Prince · CC BY 2.0 (May be cropped or resized)
Horornis flavolivaceus
Range
Central and southern China and the northern extremes of Myanmar and Vietnam; also recorded in Bhutan, India, Nepal, Thailand and elsewhere in Southeast Asia
The aberrant bush warbler is a bush warbler found in central and southern China and the northern extremes of Myanmar and Vietnam. It is recorded in Bhutan, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, the Philippines, Thailand, Timor-Leste and Vietnam, and may also occur in north-eastern and south-eastern Bangladesh (Wikipedia, general species account).
That account is the only source read for the Bhutan guide. It gives no plumage, size, habitat, diet or breeding information, so none is stated.