The Puerto Rican emerald (Riccordia maugaeus), or zumbadorcito de Puerto Rico in Spanish, is species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Puerto Rico.
Taxonomy and systematics
The Puerto Rican emerald was formerly placed in the genus Chlorostilbon. Based on a molecular phylogenetic study published in 2014 and a 2017 publication, the North American Classification Committee of the American Ornithological Society, the International Ornithological Committee (IOC), and the Clements taxonomy moved it to the resurrected genus Riccordia. However, as of 2020 BirdLife International's Handbook of the Birds of the World (HBW) retained it in Chlorostilbon.