Golden-crowned Emerald is primarily nectarivorous, and visits flowers of plants such as Justicia mexicana, Hamelia versicolor, Mirabilis sp., Cordia seleriana, Ipomoea wolcotiana, Vitex mollis, Croton suberosus, Serjania sp. and Caesalpinia pulcherrima. Many of these plants also are visited by bees and bumblebees. Presumably the emerald also feeds on small arthropods, as do most if not all species of hummingbirds (see Remsen et al. 1983).