Austral Pygmy Owl (Glaucidium nana) [XC521632]
by Dante Buzzetti from El Chalt\u00e9n, Lago Argentino Department, Santa Cruz, Argentina (song)
Austral Pygmy Owl (Glaucidium nana) [XC108137]
by Heraldo V. Norambuena from Refugio Neumeyer, Valle Challhuaco, Bariloche, Rio Negro, Argentina (song)
Subspecies
Considered by some authors to form superspecies with Ferruginous Pygmy-Owl (Glaucidium brasilianum), Tucuman Pygmy-Owl (Glaucidium tucumanum) and Peruvian Pygmy-Owl (Glaucidium peruanum). Sometimes treated as subspecies of Ferruginous Pygmy-Owl (Glaucidium brasilianum), but apparently some subtle differences in vocalizations exist. Recently shown to differ also in DNA.