These predominantly green hummingbirds have a small band of bronzy copper across their upper tails. The undersides of the tail are stone blue with white edging. Steely-vented Hummingbirds reside around the borders of humid and dry forests, in dry scrub, second growth, gardens, or in plantations. Both males and females are aggressive and typically forage by themselves at low bushes and shrubs. They also congregate in flowering trees, especially during the dry season. During the dry season, individuals are frequently seen feeding from Erythrina and Inga flowers, while they frequent Heliconia flowers during the wet season. During all times of the year, males often sing alone from an open perch near a flower territory.