
Photo: (c) Rejoice Gassah, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Myiomela leucura
Habitat
Subtropical or tropical moist lowland and moist montane forest
Range
Northern Indian subcontinent and adjacent Southeast Asia: Bangladesh, Bhutan, Cambodia, India, Laos, Malaysia, Myanmar, Nepal, Taiwan, Thailand and Vietnam
The white-tailed robin is an Old World flycatcher ranging across the northern regions of the Indian subcontinent and adjacent areas of Southeast Asia, in Bangladesh, Bhutan, Cambodia, India, Laos, Malaysia, Myanmar, Nepal, Taiwan, Thailand and Vietnam. Its natural habitats are 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.