Very small owl endemic to thorn forest and tropical dry forest of west Mexico. Active during the day. Favors forest canopy where it is rarely seen, but sometimes hunts low at forest edges. Most often detected by its tooting call, given at any time of day but mainly early and late. Like other pygmy-owls, presence often revealed by mobbing bands of small songbirds. Ferruginous Pygmy-Owl favors more open habitats, is seen much more frequently, and has pale streaks (not spots) on the crown and a slightly different tooting song.