|Male in Costa Rica|
|Range of C. bryantae|
The 9 cm (3.5 in) long, 3.5 g (0.12 oz) male magenta-throated woodstar is unmistakable with its magenta throat separated by a white collar from the green chest and flanks. The back is green and the belly is rufous. There are white rump patches, and the black-tipped tail is long and forked.
The female is 3 cm (1.2 in) long and lacks the male’s long tail. Her plumage is generally like the male’s but her throat is grey-buff instead of magenta, and the tail sides are rufous. Immature birds are like the female, but paler below and with buff fringes to the upperparts plumage.
The male gives a diving display flight alone or in loose groups. His song is a spluttering gurgle, and the call a dry chi or territorial chrrrrt.
These birds usually visit flowers of herbs, trees and scrubs for nectar, cocking their tails as they feed.
Its nest is undescribed.
- Stiles, F. Gary; Skutch, Alexander F. (1989). A Guide to the Birds of Costa Rica. Comstock Publishing Associates. ISBN 0-8014-9600-4.
- "Magenta-throated woodstar media". Internet Bird Collection.
- Magenta-throated woodstar photo gallery at VIREO (Drexel University)
- Magenta-throated woodstar species account at Neotropical Birds (Cornell Lab of Ornithology)