Owls: behavior & cognition

Several owls can locate and strike prey using hearing alone, and the underlying mechanism is unusually well documented. The barn owl (Tyto alba) has been a classic laboratory model: controlled studies, including the work of Roger Payne and later neurophysiological research by Masakazu Konishi, Eric Knudsen, and colleagues, showed that barn owls can capture prey in complete darkness using only the sounds the prey makes. The owl computes a sound's horizontal direction from the tiny difference in arrival time between the two ears, and its vertical direction from differences in loudness created by vertically offset ear openings and the facial-disc feathers that funnel sound.

Many owls also have a pronounced facial disc that acts like a parabolic collector, channelling faint sounds toward the ears, and some species show left-right asymmetry in ear position or skull structure that aids vertical localisation. These features support a hunting style in which an owl on a perch or in flight pinpoints a rustling rodent it may never clearly see.

Most owls forage at night or twilight, and their eyes are adapted for gathering light rather than for daytime acuity: the eyes are large, tubular, and fixed in the socket, which the owl compensates for with an exceptionally flexible neck that lets it rotate its head far to either side to scan. Many species hunt from a perch, watching and listening before dropping onto prey, while others, such as several harrier-like and barn owls, quarter low over open ground in flight. Diets documented across the order range from insects and earthworms to small mammals, birds, and fish, depending on species and habitat.

Owls that take many small mammals typically swallow prey whole and later regurgitate the indigestible bones and fur as compact pellets. Because pellets accumulate beneath roosts and can be dissected, they have given researchers an unusually direct, well-sampled record of what wild owls actually eat, making owl foraging one of the better-quantified aspects of raptor diet.

Owls are highly vocal, and calling is a primary way they defend space and attract mates rather than a flexible language. In many species, including the well-studied great horned owl (Bubo virginianus) and tawny owl (Strix aluco), males give hooting advertisement calls that announce occupancy of a territory, and resident pairs may countercall, with overlapping or answering hoots marking shared boundaries. Calling typically peaks in the breeding season and around dusk and dawn, and individual or sex differences in pitch and pattern are documented in several species.

Beyond hoots, owls produce a range of barks, screeches, hisses, and bill-snaps used in alarm or close-range interactions; the barn owl, for example, is known for a rasping screech rather than a hoot. These signals function in spacing and pair contact, and researchers treat them as call repertoires, not as referential speech.

Behavior claims here are drawn cautiously from institution-backed references and described with their evidence context and limits. See animal research sources for the methodology, the behavior cluster hub for the wider topic, and animal senses & adaptations for the underlying biology.