he Chilean Woodstar (Eulidia yarrellii) is a small bird in the hummingbird family, Trochilidae. It is restricted to northernmost Chile with reports from southern Peru. Its natural habitats are dry shrubland and rural gardens. It is threatened by habitat lossand is classed as an endangered species. It is usually classified in its own genus Eulidia but is sometimes placed with the Purple-collared Woodstar in the genus Myrtis. It is the smallest bird in Chile,[2] 7.2 to 7.5 centimetres long with the bill accounting for 1.5 centimetres of this.[3] The bill is black, straight, slender and fairly short, about the same length as the head. The tail is often held in a cocked position. The adult male is iridescent green above and whitish below with green sides. The throat is reddish-purple and blue but often appears blackish. The tail is long, black and forked with long, pointed outer-feathers that curve inwards. Females are green above and have a white throat while the rest of the underparts are mostly very pale buff, darkest on the belly and thighs. The tail is short and slightly graduated with green inner feathers. The outer feathers are black with a rufous base and white tip. Immature males are similar to the female but have a mottled throat and may have elongated outer tail-feathers.