This is one of the larger hummingbirds seen in the United States, but is only found in a small region of Arizona and New Mexico. They are mostly found in dry pine-oak forests at elevations between 5,000 and 9.000 feet. During the breeding season they live in riparian zones with nests constructed high in trees overhanging streams. Males are a dark green with dark grey chests; bright lime green throats and brilliant purple heads. Like other hummingbirds, these are mostly nectar feeders, but will catch small insects. Some evidence suggests that they are more insectivorous than other species of hummingbirds. Hummingbird feeders appear to have allowed them to expand their range, and males may visit feeders more regularly than females.