Owls have the most frontally positioned eyes of any animal. Contrary to popular belief, owls have excellent vision in both daylight and at night. Their pupils are huge at night, letting in great quantities of light. Meanwhile, in the daytime, they shrink to the size of a pinpoint. But it is at the expense of color defining cones, so,while owls see well in dim light, they see little color.
Owls have a few curious habits, too.
They eject this matter in the form of a hard fur or feathered pellet, one per victim. By dissecting pellets, scientists can determine what animals make up the owl's diet. When they eat insects, the pellet will contain the hard exoskeleton. Owls do not build their own nests. Instead, they use old hawk or squirrel nests, natural cavities, buildings or constructed boxes.