The cinereous owl (Strix sartorii) or Mexican barred owl, is an owl that is endemic to Mexico. Very few specimens of cinereous owl have been measured. The limited number of measurements indicate lengths between 430 and 505 cm (14.11 and 16.57 ft), male weights between 469 and 812 g (1.034 and 1.790 lb), and female weights between 610 and 1,051 g (1.345 and 2.317 lb) This large round-headed owl's upperparts are brownish gray with whitish to buff bars. It has grayish white to browish gray facial disks surrounded by darker brown and buffy bars. Its underparts are pale buff to white with dark streaks. (Source: Wikipedia.org, CC BY-SA)