ocr: HEARING IRDS' HEARING varies from species to B species. Birds that use sound to locate prey need hearing that is far sharper than a. human's. In complete darkness, this barn owl uses its ears to detect the quiet rustling of its prey. EAR EAR UNEVEN EARS A barn oi'sears. are at different levels. By moving its head fro m side FACIAL DISKS tos side, the owl builds up a sound Feathers channel sounds "image" to pinpoint its prey. toward the ear openings
