Barred Owls are easiest to find when they are active at night — they’re a lot easier to hear than to see. Visit forests near water (big bottomland forest along a river is prime Barred Owl habitat) and listen carefully, paying attention for the species’ barking “Who cooks for you?” call. At great distance, this can sound like a large dog. Try imitating the call with your own voice and then wait quietly. If you’re lucky, a territorial Barred Owl will fly in to investigate you. During the daytime, a quiet walk through mature forest might reveal a roosting Barred Owl if you are lucky.

—Cornell Lab’s "All About Birds"