The Berylline Hummingbird (Amazilia beryllina) sometimes placed in the genus Saucerottia, is a medium-sized hummingbird. It is 8–10 cm long, and weighs 4-5 g. Adults are colored predominantly metallic olive green with a rusty gray lower belly. The tail and primary wings are rufous in color and slightly forked. The underwing is also rufous. The bill of the male is straight and very slender. It is very dark red in coloration, almost bla