This smaller owl is like a cross between the Northern Hawk and Northern Saw-Whet owls, with a square, black-rimmed pale face and yellow bill. Their calls are a series of trilling toots, often the only way to find this owl in stands of thick conifers in the cold northern latitudes. Boreal Owls eat small mammals, birds, and insects. They hunt at night, except in the far north, where the sun doesn’t set in the summer. From hunting perches, they sit and wait for prey before attacking it with their talons. Like other owls, they cough up pellets of indigestible bones and fur, usually once a day. They roost in a different tree every day. Though nonmigratory, they may be seen further south of their range when food is scarce on their breeding grounds.