Emerald-bellied Puffleg

The emerald-bellied puffleg is the smallest puffleg. It is 8 to 9 cm (3.1 to 3.5 in) long and weighs 4.0 to 4.5 g (0.14 to 0.16 oz). It has a straight black bill. The male of the nominate subspecies has dark shining green upperparts with a narrow glittering bluish green forehead. It has a large white patch with green spots on its upper breast and the rest of the underparts are glittering bluish green. The tail is short and slightly forked; it is green with a markedly iridescent underside. The female is similar but without the bluish green forehead; its wings and tail are somewhat shorter. Voice: The emerald-bellied puffleg makes "a single, slightly buzzy, metallic note, 'tzit'" call at irregular intervals while hovering.