The Rufous-throated Sapphire is a small green hummingbird with a blue throat, bright red bill, and red tail and tail coverts. No other hummingbird shares this pattern. It occurs throughout Amazonia and in eastern Brazil in forest edge, savanna, and other open wooded habitats. It feeds on nectar, generally in low vegetation, but sometimes up into the canopy. It places its cup nest on a branch in vegetation.