
Photo: PJeganathan · CC BY-SA 4.0 (May be cropped or resized)
Lophophanes dichrous
Habitat
Temperate forest and subtropical or tropical moist montane forest
Range
Himalayan foothills and southern-central China
The grey-crested tit is a member of the tit family found in the Himalayan foothills and southern-central China. Its natural habitats are temperate forest and subtropical or tropical moist montane forest (Wikipedia, general species account).
That short account is the only source read for the Bhutan guide. It does not name Bhutan specifically, and gives no plumage, size, diet or breeding information, so none is stated.