The Purple-rumped Sunbird (Leptocoma zeylonica) is a sunbird endemic to the Indian Subcontinent. Like other sunbirds, they are small in size, feeding mainly on nectar but sometimes take insects, particularly when feeding young. They can hover for short durations but usually perch to feed. They build a hanging pouch nest made up of cobwebs, lichens and plant material. Males are brightly coloured but females are olive above and yellow to buff below.
Wikipedia link - http://en.wikipedia.org/wiki/Purple-rumped_Sunbird