The stone blue tail color on both males and females helps differentiate these sapphires from other hummingbirds, especially the Golden-tailed Sapphire (Chrysuronia oenone). White-chinned Sapphires live in humid or riparian woodlands, edges of tropical lowland evergreen forests, and clearings with trees. In southeastern Brazil and in the Amazon, they even inhabit white sand forests and restinga habitats. When foraging for nectar, they hover at flowers of various heights and defend flowers in large canopy trees where the often compete with other hummingbirds. They also eat spiders, beetles, and flies. These hummingbirds breed year-round and males often sing from individual song perches. Their high-pitched, squeaky song is reminiscent of an insect. At times, White-chinned Sapphires have notable population movements with birds suddenly absent from areas typically with a high number of individuals.