Stripe-tailed Hummingbird

The stripe-tailed hummingbird is 9 to 10.5 cm (3.5 to 4.1 in) long and weighs an average of 4–4.5 g (0.14–0.16 oz). Both sexes of all subspecies have a straight black bill. The nominate male has bright metallic grass green upperparts that is more bronzy on the uppertail coverts. Cinnamon rufous secondaries show as a patch on the folded wing. Its three inner pairs of tail feathers are dark bronze green; the outer two pairs have black outer webs and white inner ones with black tips, giving the species its English name. Its underparts are bright metallic grass green with white undertail coverts. Voice: The stripe-tailed hummingbird's song is "1-3 squeaky, sometimes metallic notes, then a low, dry, insectlike trill, then 1-3 more squeaks". Its calls include "a liquid, rattling trill", a "sharp, piercing peet or bzeet", and "a sharp buzz".