
Photo: Francesco Veronesi · CC BY-SA 2.0 (May be cropped or resized)
Abroscopus superciliaris
Habitat
Temperate forest, subtropical or tropical moist lowland forest, and moist montane forest
Range
Bangladesh, Bhutan, Brunei, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Thailand and Vietnam
The yellow-bellied warbler is a bush warbler found in Bangladesh, Bhutan, Brunei, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Thailand and Vietnam. Its natural habitats are temperate forest, subtropical or tropical moist lowland forest, and moist montane forest (Wikipedia, general species account).
That short account is the only source read for the Bhutan guide. It gives no plumage, size, diet or breeding information, so none is stated.