Crimson Sunbird

The crimson sunbird is a tiny sunbird, only 11cm long, that feeds largely on nectar and may take insects, especially when feeding its young. The adult male has a crimson breast and maroon back with black malar stripes, a yellow rump and an olive belly; the female has an olive-green back, yellowish breast and white tips to the outer tail feathers (Wikipedia, general species account).

It has a medium-length, thin, down-curved bill and a brush-tipped tubular tongue, both adaptations to nectar feeding. Most sunbirds can hover to take nectar but usually perch to feed. Two or three eggs are laid in a suspended nest in a tree. It is a resident breeder in tropical southern Asia from India through Nepal, Pakistan, Bangladesh and Myanmar to Indonesia and Brunei, and the call is 'chee-cheewee'. The source read does not name Bhutan.