11 - 12 cm. Bill black, straight and long. A dull white stripe behind the eye, a black stripe on cheek, and a white stripe along each side of the throat. Chin black, throat dark metallic purple, chest gray and flanks green-bronze. Presents gray spots on both sides of the rump. The tail is square, dark, and the outer feathers with white tips. Males and females are different. Male: 7.1 g. Crown blue to bluish-green, rest of back bronzy-green with a white stripe in the middle of the rump. Female: 6.5 g. Sometimes little blue on crown, color in the throat, is more reduced. Overall more brownish. Immatures have dark throat with some purple feathers and have overall plumage spotted.