Coppery Metaltail

The coppery metaltail is 10 to 10.5 cm (3.9 to 4.1 in) long and weighs about 5 g (0.18 oz). It has a medium length, straight, black bill. The adult male of the nominate subspecies has reddish bronze to reddish coppery upperparts with a greenish tone to the rump and uppertail coverts. Its slightly forked tail is bronze green with violet reflections on its upper side and shining bronze green on its underside. The sides of its head and neck are reddish bronze and its narrow gorget is glittering golden green. The rest of its underparts are a somewhat less reddish bronze green than the upperparts. Voice: The coppery metaltail's vocalizations have been described as a "series of frail zeee calls, often alternating with ttrrrt notes" and also as "a jerky, wiry chatter similar to Tyrian Metaltail , but perhaps lower, less emphatic, with buzzier notes."