There are more than 130 species of birds in the Kakapiformes, called owls. It is found on all continents except Antarctica.
Owls like to sleep among the leaves during the day and wait until night to forage. They are expert raters in the forest. Because owls have eyes at the front of their heads, rather than on either side like other birds, they can only keep moving their heads when they want to see everything around them.
Most owls live in trees, and some species live on rocks and grass. Most owls are nocturnal animals. They sleep during the day and come out at night. During the day, they hide in trees, caves, or eaves.
An owl's eyes are very sensitive to light. The conditions during the day are too harsh for them, so they sleep during the day and don't sleep at night, and come out to be active and forage.
In addition, owls have keen eyes, and visibility at night is a hundred times better than that of humans. An owl's sense of hearing is so acute that it can protect itself even in the dark when some creatures cannot see.
Owls feed mainly on rodents, but also on insects, birds, lizards, fish, and other animals. Usually, the food is often swallowed by owls as a whole. They can not digest the skeleton, feathers, hair, chitin, and other residual residue integrated into a small group. And then spit out through the mouth.
Once the owl knows where its prey is, it pounces. The feathers of the owl are so soft, with velvety feathers on their wings, that the frequency of sound waves produced by the owl is less than 1 kHz, which is not detected by the ears of other mammals.
According to research, owls' sense of hearing still serves as a locator when pouncing on prey. It can adjust the direction of the strike, depending on the sound of its prey moving, and finally, release the claw.
Owls are color-blind and are the only birds that cannot distinguish between colors. Because there are no cones in the retina, they can't distinguish colors.
Owls developed long cervical vertebrae over a long period of evolution. While humans and other mammals have only seven cervical vertebrae, owls have many more.
In addition, the cervical vertebra structure of the owl is also relatively special. The ligaments on both sides of the cervical vertebra are very developed. The developed cervical vertebra enables the owl to easily find the enemy or prey behind by turning its head in any direction.
The owl is also curious because it can rotate its head 180 degrees without turning around.
The eyes of most birds are on either side of the head and can see more than 300°.
Owls' eyes are on the front of their heads, and the field of view of their overlapping eyes is only 150°, which is close to that of human beings, which brings adverse effects to their observation and hunting.
To compensate for this, owls have developed long cervical vertebrae over a long period of evolution. While humans and other mammals have only seven cervical vertebrae, owls have many more, such as the neck-horned owl, which has 14.
In addition, the cervical vertebra structure of the owl is also relatively special. The ligaments on both sides of the cervical vertebra are very developed so that the owl's head can be turned to both sides to the range of 270°.