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. Ducks are small in size, short in feathers and limited in flight 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.

Expand the nutritional value of data:

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.

Morphological characteristics:

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 in the water.

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