Wen/Farmer is also crazy
There are many poultry such as chickens, ducks, geese and so on in the countryside, and in the past, the rural chickens were different from today's, and they let their own hens hatch the chicks. At that time, basically every household let its hens hatch chicks, and every year they would choose to hatch a few litters of chicks in the spring. Now in the countryside to raise chickens, most of them go to the market to buy half-sized chickens, after all, hatching chickens is more troublesome, and sometimes the success rate of hatching is not high.
It is also strange to say that there were many ducks in the countryside in the past, but I have never seen a female duck hatching a ducklet. When I was a child, I also asked my parents, and they just said that domestic ducks would not incubate eggs, and if they wanted to hatch ducklings, they could only let the hen do the work. And for what reason, the mother just said that domestic ducks don't incubate eggs like hens. Why let the hens hatch the ducklings instead of the hens hatch the ducklings? Is it true that domestic ducks don't incubate eggs?
When they grow up, they know that domestic ducks really can't incubate eggs, they only know how to lay eggs for a year, even if they don't lay eggs, they don't incubate eggs like hens. But don't worry that they can't reproduce, because these humans will give them to do it. Like hatching chicks, not all duck eggs can hatch ducklings, but must be produced by the fertilized female duck to hatch the ducklings in the right environment.
We all know that hens can lay eggs normally without rooster fertilization, but such eggs cannot hatch chicks. The same is true of duck eggs, because the duck eggs produced by unsfected female ducks are actually a huge egg cell (egg yolk), and only after the raised female duck is mated and fertilized with the male duck, the duck eggs are fertilized eggs, so that the baby ducks can hatch. In the past, when trying to hatch ducklings, the common practice was to let the hens do the work. After all, duck eggs are about the same size as eggs, and if you put them in the hatched hen's nest, the hens won't recognize them. After hatching, the hens will not abandon them and will take care of them like their mothers. Later, with the popularization of electricity, it is basically electric hatching ducklings, and the incubation rate will be higher. So why don't domestic ducks incubate eggs?
The reason why domestic ducks do not incubate eggs like wild ducks is mainly because of manual selection. Domestic ducks evolved from wild ducks, which still retain the instinct to hatch eggs. However, the domestic duck does not have this function anymore. Because a long time ago, humans began to domesticate wild ducks, mainly to eat eggs and eat meat, and did not want ducks to hatch duck eggs, so the egg production rate was low. So the ancient ancestors continued to choose the wild ducks that produced more eggs, and slowly after generations of breeding, these wild ducks became domestic ducks, and the ducks selected and bred were ducks with high egg production rates and would not hatch eggs, so these domestic ducks also lost the ability to incubate eggs. That's why domestic ducks don't incubate eggs, and do you know which animals only lay eggs but don't? Everyone is welcome to add! (Image source network, infringement can be deleted)