Large, dark-brown hummingbird with lilac-gold iridescent lower back and rump. Like other sunbeams, it has a proportionally short bill for a hummingbird. Inhabits high elevation, semi-arid montane ridges and cloud forests. You are my sunbeam, my Shining Sunbeam / You make me happy when you display / Aglaeactis cupripennis / Please don’t take my sunbeam away.