The owl (also known as "xiāo", 鸮 "xiāo") has a radial feather in the eye, and the arrangement of the fine feathers forms a face, which looks like a cat, hence the name Owl. Its feathers are mostly brown, scattered with fine spots, dense and soft, silent when flying. The owl's female bird is generally larger than the male. The head is large and wide, the mouth is short, the side is flat and strong, the apex is hooked, the mouth base has no wax film, and it is mostly covered by hard feathers. Like many carnivores, the owl's eyes are directly in front of the face, which gives them excellent depth perception during hunting, especially in dimly lit environments. Interestingly, the big eyes were fixed in the owl's eye socket and couldn't be turned at all, so the owl kept turning its head. They also have a flexible neck that allows the face to turn to the rear. Due to the special cervical structure, the head's range of motion is 270°. The left and right ears are asymmetrical, the left ear canal is significantly wider than the right ear canal, and the left ear has a developed eardrum. Most of them also have a cluster of ear feathers that form a human-like auricle. The auditory nerve is very developed. A Cang Cang, which weighs only 300 grams, has about 95,000 auditory nerve cells, while only about 27,000 crows weigh about 600 grams.
Owls mostly inhabit trees, some species inhabit
On the rocks and on the grass.
The vast majority of owls are nocturnal animals, crouching in the night, hidden in the groves or eaves during the day are not easy to see, but there are also some species such as the spotted 鸺鹠"xiūliú", the longitudinal stripes and the plaques, etc. Uneasy and lonely, often go out to activities; always the type of night trip, once in the daytime activities, often flying bumps may be like drunk.
The owl's food is mainly made up of rodents, but also insects, birds, lizards, fish and other animals. They all have the habit of spitting "pill", which has the ability to digest, the food is often swallowed, and the residue of bones, feathers, hair, chitin, etc., which cannot be digested in food, is integrated into small groups and passes through the esophagus. And the mouth spit out, called the pill, also called the spit. Scientists can understand their diet based on the analysis of the pill.
Once the owl judges the orientation of the prey, it will quickly attack. Owl's feathers are very soft, with velvety feathers on the wings and feathers, so the sound waves generated by the owls flying are less than 1 kHz, and the average mammalian ear does not feel that low frequency. This silent attack made the owl's offense more "blitzkrieg". According to research, when the owl is fighting prey, its hearing still plays a role. It can adjust the direction of the slamming according to the sound generated when the prey moves, and finally the claws will work in one fell swoop.
Owls are color-blind and the only birds that cannot distinguish colors. Except for some birds that are used to nightlife, such as owls, many birds have color perceptions because there are no cones in the retina and they cannot be recognized. When the crows fly at high altitudes, they need to find a place to land. The color will help them judge the distance and shape. They will be able to catch the flying insects and land gently on the branches. The ability of birds to distinguish colors also helps them find their spouses. Imagine that male birds often use colorful feathers to attract the opposite sex. If they don't feel the color, what charm does the male bird have?