The cinnamon-sided hummingbird (Leucolia wagneri ) is a bird in the family Trochilidae.
It is found, inland from the Pacific coast, in the state of Oaxaca in southern Mexico.
This species was formerly placed in the genus Amazilia. A molecular phylogenetic study published in 2014 found that Amazilia was polyphyletic. In the revised classification to create monophyletic genera, the cinnamon-sided hummingbird was one of three species to be placed in the resurrected genus Leucolia.
Some taxonomic authorities (including the American Ornithological Society consider conspecific with the green-fronted hummingbird (Leucolia viridifrons ), while others consider it distinct.
