Buff-winged starfrontlet

The buff-winged starfrontlet (Coeligena lutetiae) is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae. It is found in Colombia, Ecuador, and Peru.

The buff-winged starfrontlet is about 14 cm (5.5 in) long. Males weigh 6.9 to 7.2 g (0.24 to 0.25 oz) and females about 6.6 g (0.23 oz). Both sexes have a long, black, slightly upturned bill and a white spot behind the eye. Both sexes have a forked tail though the female's is not as deeply indented as the male's. Males of the nominate subspecies has velvety black upperparts with a glittering green forehead. They have a violet gorget and the rest of the underparts are dark green. The wings are dark with a large cinnamon-buff patch and the tail is bronzy black. Nominate females have shining dark green upperparts. Their throat is cinnamon-buff and the rest of the underparts golden green with pale fringes on the feathers. They have the same cinnamon-buff wing patch as the males but the tail is bronzy green.

Males of subspecies C. l. albimaculata have almost white wing patches but are otherwise like the nominate. Females have a paler throat than the nominate and a cinnamon tinge to the underparts, whose golden green is also less iridescent.