The Blue-headed Sapphire inhabits humid forest edges near the coast, woodland and scrubby areas of dry valleys, and cultivated areas. It hawks and gleans for insects, or gathers nectar from flowers. When foraging atop a flowering tree, these sapphires tend to act aggressively towards other hummingbirds. This species more commonly resides at higher elevations than does the similar Humboldt’s Sapphire (Hylocharis humboldtii). It also boasts more extensive blue on the upper throat and head. Females are told apart by the whiter underparts of the Humboldt’s Sapphire.