The Collared Sunbird (Hedydipna collaris), formerly placed in the genus Nectarinia, is part of a group of very small Old World passerine birds. The Collared Sunbird is a common breeder across most of sub-Saharan Africa. It is mainly found in forests near water. It is a seasonal migrant within its range.
Collared Sunbirds are tiny, only 3.5 to 4 inches long. They have short thin down-curved bills and brush-tipped tubular tongues, both adaptations to nectar feeding. The adult male has glossy green upperparts and head with a yellow belly and narrow purple breast band. The female is a duller green above and entirely yellow below. Sunbird flight is fast and direct on their short wings.
Collared Sunbirds feed largely on nectar, although they will also take insects, especially when feeding young. It is in fact mainly insectivorous. Most species can take nectar by hovering like a hummingbird, but usually perch to feed most of the time. Two or three eggs are laid in a suspended nest in a tree.