The Garden Emerald (Chlorostilbon assimilis) is a small hummingbird that is an endemic resident breeder in Costa Rica and Panama. This is a species of open habitats, including bushy savanna, clearings, cultivation and gardens. It can be found in the Pacific lowlands and hills, locally up to an elevation of 1500 m.

References:

Stiles and Skutch, A Guide to the Birds of Costa Rica.