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Interesting facts about owls

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Perhaps the most interesting birds - at least my favorite.

" Large owls have eyes the size of human eyes . However, their body weight is of course much smaller, because it is from 3 to 7kg. In some eyes, a mass of acids up to 5% of body weight. "

" Despite well-developed eyes, which are up to 2.5 times more sensitive to light than human eyes, an owl can not move his practice eyes. So to look around, have to move your entire head. Range of head movement includes about 270 degrees. "

" Continuing on the owl's eyes, these animals have the eyes of tunnel. This means that they can bring a picture like a man with binoculars. This implies, however, the underestimation of the angle of view, which without approximations is 110 degrees, of which only 70 degrees is in the range of stereoscopic vision which allows to see in three dimensions. "

"In addition, the owls are farsighted, objects very close to identifying with sensory feathers placed around the beak."

"However, despite the very well-developed eye, most of the owls is based mainly on their hearing. It would seem that some of these animals are quite big ears, but they are just tufts of feathers. The transfer of sound to the ear correspond to the appropriate stiff feathers found around the eyes and beak. This type of plumage is called and is szlarą birds (also occurs in some representatives of the order of prey) to focus high-frequency sounds (the sounds are often issued by rodents). The ears of owls are not only distributed asymmetrically, but their structure is very asymmetric. This allows the birds can locate their food based only on your hearing. "

" Most owls are nocturnal animals, however, and those living there during the day. In contrast to their colleagues the night, they are more developed color vision. Most of the night owls can see black and white image. Much of the owls have specially-developed wings designed for whisper-quiet operation. This feature does not occur only in fish-eating owls - these animals are based exclusively on vision while hunting. "

" Owls have three eyelids - one for the flicker, one for sleeping, one to preserve the purity of the eye.
Owls as the only birds blink by using the upper eyelid. "

Source: rly.pl .