The White-throated Hummingbird is a contrasting green-and-white hummingbird of open areas from eastern Bolivia and central Brazil south to northern Argentina. It is largely iridescent green, with a white throat and white belly separated by a broad green collar. The bill is black with a largely red mandible. It feeds on nectar from flowers of a variety of plant species in forest edge, marshes, clearings, and developed areas. Its cup-shaped nest is placed on a branch.