Wedge-tailed Sabrewing is a large, gray and green hummingbird of humid to semi-arid evergreen forests, second-growth open woodlands and flowering gardens. Like other hummingbirds, this sabrewing feeds on nectar and small arthropods. The chirping, insect-like vocalizations of this species can go on for several minutes before breaking into full song, which consists of a loud, gurgling warble. The widespread Wedge-tailed Sabrewing is very similar to Long-tailed Sabrewing (Campylopterus excellens), which is restricted to a small region in southern Mexico, between the two subspecies of Wedge-tailed Sabrewing; the taxonomic relationships between these populations are not well known, and merit further research. Although Wedge-tailed Sabrewing is large, widely distributed, and is not rare, very little is known about its natural history.