Why can ducks swim in the water in winter without being afraid of the cold.

On cold days, ducks swim on the surface of the water without care, leisurely foraging for food. Experiments have been conducted to show that ducks can still live normally at temperatures as low as -100. Why aren't ducks afraid of the cold?

It turns out that the duck's body has a wonderful adaptation structure and special physiological functions to the cold. First of all, the duck's body temperature is very high, in between, four or five degrees higher than the human body. Ducks have a well-developed heart and vascular system, and a high number of red blood cells in their blood.

There is a nucleus in red blood cells, in which heme is quite abundant. The affinity between heme and oxygen in ducks is weak, so oxygen is easily released in cell tissues. In this way, the respiratory and circulatory systems are strengthened.

In addition, ducks breathe more than 20 times per minute and have a more frequent heartbeat, reaching 250 beats per minute, which is 4 times faster than a person's heart rate. Ducks have a very strong metabolism and can produce a lot of body heat, so they have an ample source of heat. This is an important condition for ducks to not be afraid of the cold.

Secondly, the duck is also equipped with excellent effective performance"Insulation device", the duck body is covered with feathers. Feathers are poor conductors, and the outside air is not easy to invade, especially the close-fitting layer of down feathers, which has excellent thermal insulation performance.

Third, the duck's ** is thin, there are no sweat glands, and the subcutaneous fat layer is quite hypertrophied, which is also an ideal insulating layer.

With such layers of protection, it is conceivable that ducks will no longer be afraid of a little bit of ice, snow and frost.

Learn from others' hopes!

Because it wore a down jacket.

They're fluffy, they're very warm.

Because geese and ducks swim in the water, their feathers do not get wet.

Or how do people use duck down and goose down to make winter clothing?

Because he has feathers that are buoyant enough to float and has a lid inside his nose that blocks the flow of water, he is not afraid of water.

Wild ducks are migratory birds, and under natural conditions, they migrate south in autumn to winter, and in China, they often winter in the provinces of the Yangtze River basin or further south. In late spring, it passed through North China to Northeast China, and arrived in Inner Mongolia, Xinjiang and the former Soviet Union.

Pair breeding begins during the overwintering period, with two seasons of eggs laid in a year, with the main laying period in March and May in spring, and another batch of eggs in October and November in autumn. Most of them are nesting and laying eggs, and their nesting conditions are diverse, often nesting in weeds along lakes and rivers, or on dry land on pampas reeds.

Each nest lays about 10 eggs, the egg color is gray-green and pure white with a slight flesh color, the length and diameter of the eggs are about centimeters, and the short diameter is about centimeters. The hatching is carried out by the female, and the incubation period is 27-28 days; The male duck does not care about holding the eggs, but goes to the flock to moult, separates from the female duck after mating and breeding, and chooses another mate during the wintering period.

Are you artificially farmed? Under normal circumstances, water ducks fly south for the winter, if you are breeding, if you can't do it, you can deduct a plastic greenhouse, so that you can't freeze to death.

This is how the wild ducks of the north spend the winter:

Wild ducks are migratory birds, which migrate from the north to the south in autumn to overwinter in autumn, and often overwinter in the provinces or further south of the Yangtze River Basin.

In late spring, it passed through North China to Northeast China and arrived in Inner Mongolia, Xinjiang and other places.