Pint-sized. Prefers areas with conifers and thick understory. Fairly common, but shy and difficult to see. Patterned with brown and white overall, with streaked white forehead and blotchy rusty-brown streaks below. No ear tufts. Migratory, but numbers of migrants fluctuate greatly from year to year. Named for its loud, repetitive whistles that sound like a saw being whetted (sharpened). Also gives a harsher, rising screech. Most similar to less common Boreal Owl. Saw-whet is smaller with streaks (not spots) on forehead and richer orange-brown streaks on underparts.