The violet-throated starfrontlet (Coeligena violifer) is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae.

However, BirdLife International's Handbook of the Birds of the World (HBW) treats each of those subspecies as a separate species.

Males have a bottle green head with an iridescent turquoise forehead and a shiny golden copper back.

Data suggest that three of the violet-throated starfrontlet subspecies make seasonal elevational movements.

[11] The nominate subspecies of violet-throated starfrontlet forages for nectar by trap-lining, visiting a circuit of a variety of flowering plants.

In addition to feeding on nectar it gleans small arthropods from vegetation and captures them by hawking.

The feeding practices and diets of the other three subspecies have not been studied but are presumed to be similar to those of the nominate.

[11] The nominate subspecies of violet-throated starfrontlet's breeding season is from November to January.

What is thought to be the song of the nominate subspecies of violet-throated starfrontlet is "a mellow drawn-out whistle followed by three nasal notes 'drreeeuw…nyeh-nyeh-nyeh'."

The presumed songs of both C. v. albicaudata and C. v. osculans are a "rhythmic phrase, 'wet-tsee-tser'" alternating with high-pitched notes, though they have slight differences.

However, "since [the species] inhabits open forest and clearings, it may accept these disturbed areas to some extent.