Chaco Owl (Strix chacoensis) [XC341785]
by Barry Edmonston from Parque Nacional Teniente Enciso, Boqueron, Paraguay (song)
Chaco Owl (Strix chacoensis) [XC15393]
by Juan Mazar Barnett from San Jos\u00e9 de las Salinas, C\u00f3rdoba, Argentina (call, song)
Subspecies
Strix rufipes (Sibley and Monroe 1990, 1993) has been split into Rufous-legged Owl (Strix rufipes) and Chaco Owl (Strix chacoensis) following SACC (2005).
Usually treated as a subspecies of Rufous-legged Owl (Strix rufipes).