
Photo: (c) Doreen, some rights reserved (CC BY) · CC-BY (May be cropped or resized)
Aethopyga saturata
Habitat
Subtropical or tropical moist lowland and moist montane forest
Range
Bangladesh, Bhutan, Cambodia, China, India, Laos, Malaysia, Myanmar, Nepal, Thailand and Vietnam
The black-throated sunbird is found in the Indian subcontinent and adjoining regions of Southeast Asia, ranging across Bangladesh, Bhutan, Cambodia, China, India, Laos, Malaysia, Myanmar, Nepal, 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.