The Ferruginous Pygmy-owl (Glaucidium brasilianum) is a small owl that breeds in south-central Arizona in the USA, south through to Mexico, Central America and South America to Bolivia and Argentina. Trinidad, as well as other localities, have endemic subspecies of this owl. Recent genetics work has found substantial differences in Ferruginous Pygmy-owls from different regions, and members of the northern ridgwayi group are sometimes considered a separate species, the Ridgeway's Pygmy-owl (Glaucidium ridgwayi).