The mountain-gems are the Lampornis genus of hummingbirds which inhabit mountainous regions of the southwestern United States.
These are medium-sized to large hummingbirds with shortish slightly curved black bills. The males typically have green upperparts and a brightly coloured throat, which is a dull colour in the female. The females of some species also may differ significantly from the males in other plumage features.
The food of this genus is nectar, taken from a variety of small flowers. Like other hummingbirds, mountain-gems also takes small insects as an essential source of protein.
