In the revised classification to create monophyletic genera, the sapphire-bellied hummingbird was moved by most taxonomic systems to Chrysuronia.

The female's weight has not been documented nor its plumage described, though the latter is thought to be similar to the male's but grayer on the underparts.

[10][11] The sapphire-bellied hummingbird is found only in the mangroves of Ciénaga Grande de Santa Marta, a coastal wetland in northern Colombia, and in immediately adjoining arid scrublands.

Xeno-canto and Cornell University's Macaulay Library have only a few recordings of the sapphire-bellied hummingbird's vocalizations.

[1] Though it occurs in two protected areas, there are very few records at one of them, Vía Parque Isla de Salamanca.