The Cinnamon Hummingbird has a green head and back, a rufous tail, and cinnamon-colored underparts. It feeds at flowers and has also been observed in a protected area in northwestern Costa Rica.
Its head and back are green, the tail is rufous, and the throat and belly are cinnamon-colored. The red bill has a black tip.
It visits flowers for nectar. In Guanacaste, northwestern Costa Rica, it has been recorded feeding at Passiflora vitifolia flowers.
An extinction-risk assessment has not been added yet.