Tres Marias Hummingbird

The Tres Marias hummingbird has a broad reddish bill with a black tip. Both sexes have metallic bronze-green upperparts that is somewhat duller on the forehead and crown. Males have a turquoise-green to emerald green throat, a greeny-bronze breast, a dark green belly, and dark undertail coverts. The tail is glossy blue-black. Females' upperparts are duller than the male's and they have gray underparts. The base of their tail is bronze-green and the rest blue-black to greenish black with white tips on the outermost two pairs of feathers. Voice: The Tres Marias hummingbird's vocalizations have not been separately described from those of the broad-billed hummingbird. That species' song, sung only by males, "egins with short chip note, then a series of similar notes ranging in frequency from 2 to 13 kHz."