Sanchezzwergkauz Glaucidium sanchezi

Very small owl of tropical forest in the foothills of northeast Mexico where it is endemic. Favors forest canopy and is rarely seen, but sometimes hunts low at edges; active in the daytime. Most often detected by its distinctive tooting call, given at any time of day but mainly early and late: 13 slow-paced hollow hoots, repeated after a pause. Ferruginous Pygmy-Owl favors more open habitats, is seen much more frequently, and has pale streaks (not spots) on the crown and a very different tooting song.