The Purple-throated Carib is a spectacular endemic hummingbird of the Lesser Antilles. While most common at middle to high elevations in humid forest, this species can be fairly common down to sea level especially in secondary growth; and can occur in mangrove and dry forest. With familiarity, the distinctive low, nasal, throaty buzz of the flight call can be easily recognized when individuals are travelling or foraging at canopy level. This bird is unmistakeable in most situations, though a silhouetted bird could be mistaken for the similarly-shaped Green-throated Carib (Eulampis holosericeus) The Purple-throated Carib shows black plumage with a royal purple throat and upper chest and green wing coverts, blue undertail coverts, and a medium-length decurved bill, which it uses to feed on Heliconia flowers. In plumage, the Purple-throated Carib is monomorphic, but the male is slightly larger, and more agressive, maintaining smaller territories within areas of high flower density, relative to the large, low-density territories of the females. Movements of this species are not well known, though it has occured as a vagrant to Barbados, Barbuda, Grenada, and the Virgin Islands.