What hawks will appear at night, what will nighthawks do at night

There are many types of eagles, some are called eagles, some are called eagles, kites, owls, owls, eagles, falcons, etc., the most common or the most known to us, the eagle that acts at night is the owl (this is also a general name, there are more detailed names in it), but I think since there are more than 190 kinds of eagles, and not all of them are called eagles, there must be some eagles that we don't know much about, which are also nocturnal. Owls can hunt at night because: In the retina of the owl's eye, there are extremely rich columnar cells.

Styloid cells can sense light signals from the outside world, so the owl's eyes should be able to perceive very faint light. If we compare a bird's eye to a camera, the eyes of most birds suitable for daytime activities are small-aperture standard lenses, and the owl's eyes are large-aperture, long-focal length telescopic lenses. So for a long time, it was thought that owls flew and hunted in the dark by sight.

But this is not true. The owl's sense of hearing is very sensitive, and in the dark environment where the fingers are not visible, the sense of hearing plays a major role in positioning. The owl's left and right ears are asymmetrical, the left ear canal is significantly wider than the right ear canal, and the left ear has a well-developed ear drum.

Most owls also have a cluster of ear feathers, which form a human-like pinna. The auditory nerve of an owl is well developed, and a barn owl weighing only 300 grams has about 10,000 auditory nerve cells, while a crow weighing about 600 grams has only 10,000 cells. In addition, the owl's face is densely packed with raw hard feathers to form a noodle plate, and this noodle plate is a good sonic collector.

The owl's large head allows for a greater distance between the ears, which enhances the resolution of sound waves. When an owl searches for prey in the dark, its first response to sound is to turn its head, just as we listen intently to a tiny noise. But the owl doesn't really listen, it turns its head to make a difference in the time it takes for sound waves to reach the left and right ears.

When this time difference increases to more than 30 microseconds, the owl can accurately distinguish the orientation of the sound source. Once the owl has judged the direction of its prey, it quickly strikes. The owl's feathers are very soft, and the wing feathers have velvety dense down, so the frequency of the sound waves produced by the owl when flying is less than 1 kHz, while the ears of the average mammal do not feel the low frequency.

Such a silent sortie makes the owl's attack more "blitzkrieg" effect. According to research, the owl's sense of hearing still plays a role in positioning when it pounces on its prey. It can constantly adjust the direction of the attack according to the sound generated by the movement of the prey, and finally claws out, which is effective in one fell swoop.

Of course, the owl's role in predation is complementary to the role of sight and hearing, and it is precisely in all aspects that it adapts to the nocturnal life and becomes an efficient nocturnal hunter. So based on the characteristics of owls that can hunt at night, I think that all the eagles in the eagle class can hunt at night, and maybe some eagles can hunt at night in other ways, which I don't know yet.

There are two kinds of meanings of the nightingale, one is the meaning of resentment and sorrow; The other allegorical is the desire for a good life, which symbolizes a free life, but also a desire for a free world.

Nightjar generally refers to the nightjar family, a total of 80 species in the world, 7 species in China, sometimes including the species of the American nightjar subfamily, and even refers to the species of the entire nightjar order. With the exception of New Zealand and some islands in Oceania, true nighthawks are found in temperate and tropical zones of almost the world. Available in gray, brown or reddish-brown protective colors.

Feeds on flying insects and preys on them during flight at night.

The nightjar is also known as the mosquito mother bird, it often crouches on the slopes or branches of many trees during the day, and when it rests on the trees, its body is close to the branches, like a dry tree knot, so it is commonly known as sticking to the bark. Scientists refer to this body color, which is similar to the color of the environment, "protective color", which helps animals hide themselves and capture food more effectively.

Its main characteristics are that its mouth is short and wide, it can open very wide, it can carry a large number of insects into its mouth when catching insects in the air, it has well-developed mouth whiskers, and its nostrils are tubular shaped. The beak is short, the beak is broadly lobed, the muzzle is long, and the eyes are large. The body feathers are soft, dark brown, with fine transverse spots, and white spots on the throat.

Males also have white spots on their tails, which are especially noticeable when flying. His sense of hearing and vision are keen, and his big eyes sparkle in the dark. There is a comb-like rim on the middle toe.

This bird is all over the eastern part of our country, from the northeast to Hainan Island, west to Gansu and other places.

Nightjar feathers are very similar to the bark of the tree and have a good protective color, making it extremely difficult to spot. It is often active at night, and is very active at dusk, constantly hunting mosquitoes, flies, moths and other insects in the air. When flying, the wings flap slowly, and it can glide for a long time, and when catching insects, it can fly around with sudden twists and turns.

When encountering an enemy, it can fly away quickly and silently. It often chirps at night, making a continuous monosyllabic call, slightly like "tower, tower, tower, tower". It breeds between May and July every year, never nests, and lays its eggs on the ground, on rocks, in dense woods, among bushes, and under weeds or shrubs.

Two eggs are laid at a time, and the eggs are white in color, mixed with grayish-brown and dark gray spots, and are about millimeters long. The female is responsible for incubating the eggs during the day. Morning and dusk are replaced by males.

Because it eats lepidoptera, coleoptera and other insects, it is a well-known agricultural and forestry bird.

The nightjar, also known as the "mosquito mother bird", is a beneficial bird in agriculture and forestry, and especially loves to eat beetles, moths and mosquitoes and other pests. The nighthawk's beak is extremely wide, can be opened very wide, and there are rows of stiff whiskers on both sides of the mouth, and when catching insects in the air, the large mouth is like a net of insects that can carry a large number of insects. When it rests on a tree, its body is attached to the branches, like a dead tree, so it is commonly known as "sticking to the bark".

This "protective color" is conducive to the night bureau cherry eagle to hide from predators and catch food.

The natural predators of the nighthawks are: humans, birds of prey, and cats.

I saw the eagle hovering what Zhenghui sold rough omen:

Seeing the eagle circling, people think it is a good omen, indicating that someone in the family is about to be promoted, or to give birth to an extraordinary person.

Let's see what the eagle really wants to hover through the air:

The eagle hovering in the air is not simply a leisurely relaxation, it is always keeping its eyes on the prey on the ground. The eagle's eye vision is not the usual good, it can see thousands of meters with a reed, and it is many times better than human vision, that is because the eagle has two fovea on the retina, while humans have only one.

Summary. Hello dear, the nightjar hunts at night.

Hello dear, the nightjar hunts at night.

Nighthawks are active at night and fly with their beaks open to catch insects.

During the day, it rests on the branches of the tree because its feathers are like the bark of a tree, forming a natural "protective color".

Nightjars are nocturnal birds with long tails, long wings, large eyes and small beaks, but their beaks are very wide and wide, and their protective colors are well camouflaged. During the day, they usually crouch motionless on tree branches, tree trunks, or forest ground to rest, and are difficult to spot.

Nightjar is found in a variety of habitats, but more often than in wooded areas. Its chirping is a series of loud, rapid, and rhythmic "churk-churk-churk-churk" sounds, about four syllables per second, with short breaks between repeated chirps, like "machine gun" sounds, and generally does not chirp in winter.

Nightjars generally fly out in the morning and dusk to feed, especially at dusk is the most active, fast and silent, often with a burst of gliding after the wings are flying, circling in the air, preying on various insects such as Lepidoptera, Hemiptera. Nightjars' nests are built directly on the ground and generally lay only two eggs. The eggs are "camouflage" and look like ordinary stones on the side of the road.

The nightjar is distributed in China, from the northeast to the southwest and most of the east (including Hainan and Taiwan), breeding in the east and south of China, wintering in southeast Asia, including South China, and is a common summer migratory bird and a traveling bird, breeding in the open shrubs and broad-leaved forests, coniferous and broad-leaved mixed forests, sparse forest shrubs, bamboo forests, and farmland in the plains and hilly areas, and is also more and more adapted to the urban environment, often resting on the top platform of buildings.

The main food of the nightjar is large flying insects such as beetles, grasshoppers, cicadas and insects such as noctuidae and gnats. They hunt on the fly, especially at dusk.

1. It is normal for eagles to call.

2. Eagles are the top consumers in the predatory food chain and have no natural predators, but theoretically eagles can have parasitic natural enemies. As the natural enemy of snakes, eagles have a set of defensive measures and skills, and in the process of preying on snakes, bites or even deaths rarely occur.

3. Eagles mainly have physical advantages and slippery predation skills, long legs make it difficult for snakes to entangle their bodies, and the thick scales on the surface of their feet are like a thick layer of armor, even the sharp teeth of poisonous snakes cannot penetrate. In the process of preying on snakes, the snake vulture will avoid the snake's frontal attack, jump behind to attack high, and finally wait for the snake to be exhausted, and then make the final blow to grab the snake's vital point with its claws, killing the snake. Qi let know.