Why "OWL" can't move their eyes????
Owls don't have eyeballs. The eyes are long and shaped more like a tube. Owl eyes can't turn in their sockets because of this shape.
Owls and the related nightjars (including Whip-poor-wills and nighthawks) are among the only birds that have a larger upper eyelid than lower eyelid. That, their forward-facing eyes, and feather-covering at the base of their beak, make them appear more human-like than other birds. Their human-sounding voices are one reason so many cultures throughout the world have stories and folklore about owls.
Owls can see in the daytime. Their pupils don't get as small as ours in bright light, so to block out the extra light, they often close their eyes half-way or more. They may look sleepy or even half asleep when really they are wide awake and alert.
Vision cells (called rods and cones) are in the retina of all animals. But birds and primates (including humans) have a special area in the retina called the fovea where these vision cells are especially concentrated. In hawks and owls, the fovea is on the upper part of the retina, so things below the owl appear exceptionally clear. This helps them hunt on the ground. When owls close their eyes half way, they block out the sky and some of the sunlight, but can still see the ground below perfectly
Owls and the related nightjars (including Whip-poor-wills and nighthawks) are among the only birds that have a larger upper eyelid than lower eyelid. That, their forward-facing eyes, and feather-covering at the base of their beak, make them appear more human-like than other birds. Their human-sounding voices are one reason so many cultures throughout the world have stories and folklore about owls.
Owls can see in the daytime. Their pupils don't get as small as ours in bright light, so to block out the extra light, they often close their eyes half-way or more. They may look sleepy or even half asleep when really they are wide awake and alert.
Vision cells (called rods and cones) are in the retina of all animals. But birds and primates (including humans) have a special area in the retina called the fovea where these vision cells are especially concentrated. In hawks and owls, the fovea is on the upper part of the retina, so things below the owl appear exceptionally clear. This helps them hunt on the ground. When owls close their eyes half way, they block out the sky and some of the sunlight, but can still see the ground below perfectly
No comments:
Post a Comment