The White-bellied Woodstar is common in montane forest on the eastern Andes and also occurs in humid montane forest on the western slope. Males have a conspicuous violet throat, while females have rufous sides to the breast and belly.
It is about 8 cm long. The male has green upperparts and a broad violet throat, with green on the sides of its otherwise white breast and belly. The female is green above and white below, with rufous sides to the breast and belly. Both sexes have a white stripe running from behind the eye, down the neck, and toward the breast.
It is common in montane forest on the eastern slope of the Andes. It also occurs in humid montane forest on the western slope, south to La Libertad.
An extinction-risk assessment has not been added yet.