The Shining Sunbeam is a large, dark-brown hummingbird with lilac-gold iridescent lower back and rump. It is found in Colombia, Ecuador, and Peru. It has a proportionally short bill, with males having a metallic dusky brown above, dark on crown and ear-coverts. Its face and underparts is cinnamon-rufous, tail is bronzy olive, lateral feathers with rufous on inner webs. There is an area of glittering purple on lower back, becoming coppery on rump and green on uppertail coverts. Females are similar to males but lack most of glitter on back and rump.