Edges of humid forests, pastures, and cultivated areas with trees are all home to these small hummingbirds. White-bellied Woodstars fly slowly like bumblebees and can consequently sneak nectar from the territories of other hummingbirds. They search for flowers at all levels and frequently perch high out in the open. Although they tend to forage by themselves, these woodstars sometimes join other hummingbirds in flowering trees. Both sexes have large white flank patches, and a light stripe behind the eye. Males have a wide white chest band, while females are buffy on their upper underparts.