an olive brown female sunbird feeding upon the nectar of calotropis flower.

apocynaceae asia asiatica asiaticus bill bird brown calotropis cinnyris curved cyme dimorphism eye fauna feathers feeding female flower flowers hummingbird india latex mauve milkweed nectar nectarinia olive perch plumage pointed poisonous pollination pollinator purple sexual small southeast sunbird supercilium tongues tubular yellow