Is it true that cuckoos have nest parasitic behavior? Why do they do it?

I think their behavior is real, and the reason why they do it is entirely because they don't have the ability to raise their own children, and they have to put their own children in other people's nests for all their words.

It's true. In order to ensure their own nutrition, in order to ensure the acquisition of nutrition, but also to make their body healthier, in order to supplement nutrition. That's why they behave like this.

The nest parasitic behavior of cuckoos is real. Probably because they don't have time to raise them, they don't have birds to build nests.

The nest parasitic behavior of cuckoos belongs to the phenomenon of social parasitism.

There is an instinctive behavior of cuckoo birds that do not have nesting, incubating eggs and brooding, so they lay their eggs directly in the nests of other small birds such as the great reed warbler when they lay their eggs. Because the eggs and the host are very similar in size, shape, color, pattern, etc., the nest host cannot be recognized, so they incubate the eggs on their behalf. Cuckoos are usually larger than nest hosts and emerge early.

Once it emerges, it pushes the eggs or chicks of the nest owner out of the nest and enjoys the feeding of the nest owner alone.

Common forms of parasitism.

One organism inhabits the body or body surface of another organism, and absorbs nutrients from it to maintain the survival of the individual and cause varying degrees of harm to the host, such as hindering the growth and development of the host, reducing the vitality and fertility of the host, but generally does not cause the host to die quickly. This mode of parasitism manifests itself in ectoparasitism and endoparasitism between various groups of animals. For example, lice, fleas and other parasites on the body surface of other animals are ectoparasitics; Ascaris, tapeworms, schistosomiasis, Plasmodium parasites, etc., parasitize in other animals.

It is amazing that cuckoos lay their eggs in other birds' nests and let other birds hatch and feed them on their behalf.

According to the data, about one-third of cuckoo birds reproduce in a parasitic way. It will choose the time of spawning, the time of incubation, the size of the egg, and the appearance of the bird similar to their own eggs, and will take away one or all the eggs in the parasitic nest before laying eggs, so that their eggs can hatch to gain a survival advantage, the cuckoo bird only secretly in the host's nest, quickly lay an egg, and even after the cuckoo hatchling, it will push other eggs in the nest or the host young bird out of the nest and monopolize the food, so as to obtain the greatest right to survive.

All this is in the precise calculation, if human society is used to regulate its behavior, fraud, embezzlement, **, and crimes are all included.

Could it all be the result of biological evolution? Or is it wisdom that leads the cuckoo bird to perform these acts? Why don't two-thirds of the other cuckoos behave in this way? So why haven't other birds evolved this behavior?

This kind of calculating wisdom is comparable to some behaviors in human society. Who exactly taught a third of the cuckoo birds to make "bad"?

Nowadays cuckoo birds are generally polygamous, while birds that make nests are monogamous. It takes a lot of time for birds to build a nest that can raise their offspring, and it takes both male and female to build it together. However, it takes a long time to build a nest, so male cuckoos generally only breed with female cuckoos, and do not build nests for female cuckoos to raise offspring.

Parasitic female cuckoos continue to lay eggs from March to July and can lay 15 eggs a year, and parasitic cuckoo eggs hatch in a short period of 12 days.

The parasitic female cuckoo feeds her chicks herself, usually in conjunction with the newly hatched chicks, but she does not have time to hatch the eggs and feed the chicks that have just broken out of the shell. I had to find other birds to help take care of my chicks.

To be clear, although a small number of cuckoos occupy the magpie's nest, most cuckoos still prefer to raise their offspring themselves, which also shows the love of the female for her children.

Cuckoos do not build nests. The breeding method of this bird is very special, it does not build its own nest, but secretly puts its eggs in other birds' nests, and chooses "Lu Tanzi righteous relatives" for the little ones who have not been born. The incubation and nurturing matters are all left to the "righteous relatives" to do, and they don't care about it. <

Cuckoos don't nest early. The cuckoo is a bird that breeds in a special way, it does not build its own nest, but secretly puts its eggs in other birds' nests, and chooses "righteous relatives" for the unborn waiters and guys. The incubation and nurturing matters are all left to the "righteous relatives" to do, and they don't care about it.

Cuckoos do not build nests. The cuckoo is a bird that breeds in a very special way, it does not build its own nest, but secretly puts its eggs in other nests, and chooses a good "prosthetic" for the little one who is not born. The incubation and nurturing matters are all left to the "righteous relatives" to do, and they don't care about it.

Cuckoo: The cuckoo bird is a common name for birds in the cuckoo family, and the common ones are the great cuckoo, the three-voiced cuckoo, and the four-voiced cuckoo. The big cuckoo calls like "cuckoo, cuckoo", so it is also called cuckoo; The three cuckoo calls like "Mi Guiyang", so some places call it Mi Guiyang; The four-sound cuckoo, also known as Zigui bird, calls like "quickly cut wheat", "cut wheat and cut grain".

The cuckoo feeds on insects and is a well-known forest bird. For example, other birds such as pine caterpillars and poisonous moths are afraid to eat, but they are a delicacy for cuckoos. Most inhabit the woods of tropical and temperate regions.

About two-thirds of cuckoos, including all species in North America, nest and nurse their young; Only about one-third of cuckoos raise their young in a parasitic way. Nest parasitism is a special reproductive behavior in which birds lay their eggs in the nests of other birds, and their prosthetic parents incubate and brood on their behalf. **The meadow pipit (anthuspratensis) fed on the large rhododendron is an example of an interspecific nest parasitic type.

The great cuckoo is one of the more typical of the more than 80 species of nest parasitism, and it can parasitize its eggs in the nests of 125 other species of birds.

There are about 50 species of cuckoos in the world that lay eggs in the nests of other species of birds and do not build their own nests. However, the cuckoo that lives in India and the American continent is not an irresponsible parent, and is personally responsible for building nests, incubating eggs, and feeding chicks. There are also cuckoos that are so resistant that they never build nests.

Seeing that other birds have superior housing conditions, they will go to "occupy the nest as the king".

There are about 50 species of cuckoos in the world that lay eggs in the nests of other species and do not build their own nests. However, the cuckoo living in India and the American continent is not an irresponsible parent, and is responsible for building nests, incubating eggs and feeding chicks. There are also cuckoos that never build nests.

Seeing that other birds have superior housing conditions, they will go to "occupy the nest as the king".