The Peruvian wren (Cinnycerthia peruana) is a species of bird in the family Troglodytidae.

[4] Confusingly, after the split the name sepia-brown wren was transferred to C. olivascens by the International Ornithological Committee (IOC), but the South American Classification Committee of the American Ornithological Society (SACC/AOS) and the Clements taxonomy call it Sharpe's wren.

[4] The Peruvian wren is found in the Andes of Peru between the departments of Amazonas and Ayacucho.

[4] The Peruvian wren appears to have a protracted breeding season, base on the dates that occupied nests, newly hatched chicks, and fledglings have been observed.

[4] Peruvian wren pairs often sing in duet, "a magnificent series of rich trills and clear whistles" [1].