Blue-tailed Emerald Chlorostilbon mellisugus

Common small green hummingbird of humid lowlands. Males rich iridescent green, with a bluish sheen to the face and breast, and deep blue tail. In poor lighting, appears uniformly dark green. Female has gray underparts, and blackish cheeks bordered above by a whitish stripe. Bill black in both sexes. Found in a variety of rainforest habitats, but most common around forest edges, including in agricultural areas.