The Western Emerald is a small hummingbird of western Colombia and the Andes of Ecuador. Males glitter green, while females are green above and grey below.
Males are glittering green overall with a lighter green cap. Females are green above and grey below.
In Pichincha, Ecuador, a female nested in a secondary-growth shrub patch at a public recreation site near a river; the nest was attached to a branch with plant fibers and spiderwebs.
An extinction-risk assessment has not been added yet.