The amethyst-throated sunangel (Heliangelus amethysticollis) is a species of hummingbird in the "coquettes", tribe Lesbiini of subfamily Lesbiinae.

The International Ornithological Committee (IOC), BirdLife International's Handbook of the Birds of the World (HBW), and the Clements taxonomy assign these four subspecies to it:[3][4] The South American Classification Committee (SACC) of the American Ornithological Society includes three other subspecies.

[7] Subspecies H. a. laticlavius has a reddish purple gorget, a whitish breastband, and a buffy grayish belly.

H. a. decolor has a paler frontlet than the nominate; its gorget is a deeper violet, its breast band whiter, and its belly grayer.

[7] The amethyst-throated sunangel feeds on nectar and also includes a high percentage of insects in its diet.

It typically places it about 1.5 m (5 ft) above ground and under a leaf or clump of moss that shelters it from weather.

The amethyst-throated sunangel's call is "a short, buzzy, dry trill...repeated at intervals.