What Do Owls Eat?

Small mammals like mice, voles, and rats make up the largest part of most owl diets. These tiny rodents are abundant across North America and relatively easy for owls to catch compared to larger prey. Different owl species prefer different prey sizes based on their own size. Barn owls hunt mostly mice and rats in agricultural areas. Great horned owls, being among the largest owls, can take bigger prey like rabbits, hares, and even young groundhogs. Screech owls focus on insects and small rodents because of their smaller body size. Along with mammals, many owls also eat birds, ranging from small sparrows to larger ducks depending on the owl's size and hunting ability. Some owls, like barn owls, hunt almost entirely on small mammals. Others, like short-eared owls, supplement their diet with more birds. Insects, frogs, and fish round out the diet for some species. What an individual owl eats depends most on what animals live nearby and how large the owl is.

Owl diets shift with the seasons based on prey availability. In spring and summer, when insects and birds are abundant, many owl species eat more of these foods. Young birds learning to fly are especially vulnerable during these months, so insect-eating and bird-hunting owls have good opportunities. Fall migration brings different bird species through North America, changing what's available to hunt. As temperatures drop in winter, many bird species migrate south, so owls that normally eat birds must adapt. Great horned owls are flexible hunters that can find prey year-round. They hunt whatever is most available, switching between rodents, rabbits, and birds with the seasons. Barn owls depend heavily on mice and rats, which are active under the snow in winter, making them accessible prey even when the ground is frozen. Other owl species may have to expand their diet or hunt more aggressively during winter when food is scarce. Availability changes dramatically by region, so owls in different parts of the country face different seasonal challenges.

Owl diets vary across different regions of the United States based on what prey lives there. In California, owls encounter diverse prey in varied habitats. Western grasslands and deserts support different rodent species, including kangaroo rats and pocket mice. Short-eared owls in these open spaces hunt small mammals efficiently. In eastern forests, the mix of trees, fields, and wetlands supports different prey. Barn owls thrive in agricultural regions where mouse populations are high in grain fields and barn structures. Swamps and marshes in the South support fish owls and water-hunting species more readily. Texas owls have access to unique prey species found in that warm climate. Screech owls in forested areas have better access to insects and small woodland creatures than owls in open prairie. Mountain regions support different rodent species at different elevations. Some mountain owls depend on pikas, mountain voles, and high-altitude insects. Coastal areas bring opportunities to hunt seabirds and marine prey. Long-eared owls in wooded areas focus on rodents. Regional variation in prey species means that an owl in Florida eats very differently from an owl in Maine. Understanding local prey is key to understanding what any particular owl population hunts.

Owls hunt using exceptional night vision and hearing that most animals cannot match. They fly silently through the darkness, relying on sound to locate prey before they see it. Large facial discs funnel sound waves toward their ears, which are positioned unevenly on their heads, allowing them to pinpoint prey location by the slight time difference in sound arrival. Most hunting happens at night when owls have a major advantage over prey. They swoop down on unsuspecting animals from above, using their talons to grab and kill quickly. Sharp talons are weapons designed for different prey sizes. Great horned owls have talons that can crush large rabbits and hares. Smaller screech owls and saw-whet owls use their talons on insects and tiny rodents. Barn owls hunt by listening for movement in grass and leaves from high above, then diving toward the sound. Some owls hunt from perches, waiting and watching for movement. Others patrol back and forth over open ground searching for prey. Once caught, owls typically swallow small prey whole. Larger prey is torn into pieces before eating. Owls produce pellets containing indigestible bones and fur, which they regurgitate after meals.

Baby owls depend completely on their parents for food during their first weeks of life. Parent owls hunt constantly to feed growing chicks, bringing back whatever prey they catch. In the first days, chicks eat tiny pieces of prey that parents tear apart for them. As chicks grow, they begin swallowing larger chunks and eventually whole animals. The diet young owls receive matches what their parents normally hunt, so diet varies by species and location. A great horned owl chick might eat mice, rabbits, and birds as it grows. A barn owl chick eats more mice and rats. Young owls fledge at different ages depending on species, ranging from six to twelve weeks old. After leaving the nest, young owls still depend on parents for food for several weeks to months. They learn to hunt by watching parents and following them on hunting trips. Young owls make many mistakes while learning, and some starve before becoming skilled hunters. Once they become independent, young owls continue eating whatever prey their region offers. First-year owls may eat slightly different prey than adults if they hunt in different areas, but diet preferences depend on what they learned from parents during the critical learning period.

Owls living near humans often benefit from artificial prey sources like barn mice attracted to grain stores and bird feeders. In suburban and rural areas, barn owls hunt rodents around agricultural buildings and open spaces. Screech owls in backyards may eat insects attracted to outdoor lights. Rodent populations around homes and farms provide owls with reliable hunting grounds. However, not all interactions between owls and people are beneficial. Some owls hunt pet birds, especially doves and small chickens that owners keep outside. Protecting chickens and small pets requires secure enclosures and avoiding outdoor roosting spaces. Never leave pet food outside, as it attracts rodents that become owl prey. Never feed owls directly or provide live prey. Rat poison and pesticides used on lawns kill both rodents and owls that eat poisoned prey. Using natural pest control methods protects both local wildlife and owls. Keep outdoor areas clear of debris that attracts rodents. Secure garbage in sealed containers. If you hear owls hunting near your home, this is normal behavior and they help control rodent populations. Owls and people can coexist peacefully when humans understand that owls are natural pest controllers that have lived in North America for thousands of years.

Hawks and falcons are other birds of prey that hunt similar prey to owls, but they hunt in different ways. Red-tailed hawks hunt during the day while most owls hunt at night, so they compete less directly for prey. Hawks rely on eyesight to spot prey from high in the sky, whereas owls use hearing and night vision. Both eat rodents, rabbits, and birds, but their hunting methods differ greatly. Falcons, like the peregrine falcon, specialize in hunting birds in flight during daylight hours. Merlin falcons are smaller and hunt insects and small birds. Eagles take larger prey and are less common than either owls or hawks. Eagles prefer fish and waterfowl when available. Burrowing owls in grasslands eat more insects than most other owls, which sets them apart from their cousins. Barn owls specialize in small rodents more than any other owl species. Short-eared owls hunt more birds than great horned owls do. Learn more about owl sounds by exploring our comprehensive wildlife resources. Different owl species have evolved to hunt different prey and hunt at different times, which reduces competition between them. Understanding these differences helps explain why different owl species can live in the same region without directly competing for the exact same food. Visit the wildlife guide to explore more raptor species and their diets.