How long can ducks live?
Behavioral characteristics of ducks
Ducks are the floorboard of waterbirds in Rhus, which can be divided into wild ducks and domestic ducks. Wild ducks are smaller and have shorter necks. They live on water all the year round and have strong diving ability. They feed on small animals (small fish, shrimp, etc.). ) In the water. Abby Mallard wild ducks are big, live in water or land, and feed on small animals (fish, shrimp, loach, etc.). ) and plants (aquatic plants, barnyard grass, rice, etc. ) In the water. Unlike swans and geese, ducks have the following characteristics: smaller size, shorter feathers and limited flight distance.
Biological habit
(1) drakes change their feathers twice a year; The eggshell is smooth; The legs of both sexes are covered with overlapping scales. All ducks reach sexual maturity within the first year, and only pair in the breeding season.
(2) Unlike swans and geese, which of the following are ducks? Features: Ducks are small in size, short in feathers and limited in flying distance. All ducks are sexually mature in the first year, and they are paired in the breeding season, unlike swans and geese, which mature late and pair for life. According to the unique behavior of ducks, ducks can be divided into three categories: drilling ducks, diving ducks and perching ducks. The mallard duck is a typical duck and the ancestor of most domestic ducks. Habitat ducks, such as Moscow ducks, have long claws and are favorite arboreal ducks. There are the most kinds of diving ducks (including the ocean). The mallard flies from the south to the north to lay eggs in spring, and then flies to the south for winter in autumn. After they were domesticated by humans, they lost their frivolous migration. Duck's eyes have a 360-degree field of vision, and you can see behind you without turning your head.
nutritive value
Fatty acids in duck meat have a low melting point and are easy to digest. It contains more B vitamins and vitamin E than other meats, which can effectively resist beriberi, neuritis and various inflammations, and also resist aging. Duck meat is rich in nicotinic acid, which is one of the two important coenzymes in human body and has protective effect on patients with heart diseases such as myocardial infarction.
Floating reason
Duck's tail has a large fat gland called caudate fat gland. Its chest can also secrete a kind of "powder"-like horny flake, which contains fat. Usually, I often peck and grind the fat secreted by the fat glands on the tail of the feather and the "powdery" keratin flakes secreted by the chest hair, so that the feather will not touch the water when entering the water. At the same time, its feathers are very light and can be lifted by water and float on the water. Besides, geese and waterfowl are just like ducks. Although chickens also have fat, the amount is very small, so they can't float in the water.
Related literary and artistic works
(1) Song Author: Su Shi Style: Four Musts "Hui Chong Chunjiang Night Scene":
Two or three peach blossoms outside the bamboo forest and ducks in the water first noticed the warm spring.
Artemisia arenaria is full of short reed buds, which is the time when puffer fish want to fuck.
(2) Song Author: Genre: Four Musts "Early Summer Tour":
Duck pond water is shallow and deep, and the weather is half sunny and half cloudy when plums are ripe.
The East Garden is full of wine and the West Garden is drunk, and the loquat trees are golden.
(3) Tang Author: Bai Juyi Style: Five Methods "Official House Leisure"
Work is scattered, leisure, and the body is sloppy. Wine is the only way to send spring, and chess is not sold in Japan.
Rumi Swertia rice, garden vegetable duck feet sunflower. After a full meal, I will still clean up, and I will be a turtle in my spare time.
(4) Tang Author: Ning He genre: the word "River"
Write down infinite fish notes, just like locked flowers in spring.
I can't see the clouds and rain in Wushan, and I can't help dreaming.
But I love the fragrant duckling and envy him for growing up on the screen.
⑤ China's modern literary work Shen Congwen's novel Duck. Zhu Xuanxian's Chinese paintings Spring Breeze, Spring River Warming and Autumn Knowing, and Su Huilun's Singing Duck.