Science Insider
Do you know that you really can see an owl’s eye through its ears?
Vidunenahawula Website (National Institute of Fundamental Studies)

Do you know that you really can see an owl’s eye through its ears? The hole is covered with many feathers but if you push the feathers apart then you would see openings in their skulls. Owls’ have unusually large ear holes and we can see its eyeball through the ear. Owls, like all birds, do not have an external ear structure that we find in mammals. Owl’s ears are considered impressive adaptations.You can’t really see its ears on the outside, but as the structure is almost entirely on the inside. Most owls are nighttime hunters, and their exceptional hearing helps them to locate their fast-moving meals in the dark