Tiny, even for a hummingbird, this species occupies most habitats with flowers, except dense woodlands. Note the plain coloration of both males and females as well as the relatively short bill. The female Hispaniolan Emerald and Streamertail are similarly patterned but are distinctly larger, longer tailed and proportionately longer billed. This species is often heard before seen. Its song is a series high-pitched, squeaky “swee” and “swee-ip” notes. Calls include a variety of high squeaky notes and occasionally buzzes.