Fairly small fork-tailed hummingbird of lowlands. Males have an iridescent green head and breast and a violet belly, but in poor light appears evenly dark overall. Females are green above, light gray below. Note the slightly drooping bill on both sexes. One of the most common hummingbirds in lowland Amazonia; found in a variety of open forested habitats from young rainforest and forest edges to treefall gaps and gardens.