The Peruvian racket-tail (Ocreatus peruanus) is a species of hummingbird in the "brilliants", tribe Heliantheini in subfamily Lesbiinae.

[4][5] The Peruvian racket-tail, as defined by the International Ornithological Committee (IOC) and the Clements taxonomy, is one of three species in genus Ocreatus.

However, BirdLife International's Handbook of the Birds of the World (HBW) treats the taxon as one of eight subspecies of booted racket-tail (O. underwoodii).

On the Peruvian racket-tail, those feathers are straight and do not cross; the flags are narrow ovals that slightly overlap.

Both sexes have greenish upperparts without a glittering forehead, both have a white spot behind the eye, and both have cinnamon leg puffs.

It makes a tiny cup nest of plant fiber and lichen, typically on a horizontal twig 6 to 8 m (20 to 30 ft) above the ground.

Both male and female Peruvian racket-tails give "a diagnostic, descending, thin sweet trill, 'ti-tlee-ee-ee' [and] single 'tsit' and 'trrt' notes.