The pinyin pronunciation of duck is yā.

The duck is a member of the family Duckidae, relatively small in size, with a short neck, a larger beak in some genera, and a waddling gait with the legs situated at the back of the body (as in the case of the swan), the males change their plumage twice a year, and females lay more eggs in each clutch, with smooth egg shells; the legs are covered with matching scales, and the quacking voice shows some degree of sex differentiation. The calls show some degree of sex difference.

June 2, 2006, the Chinese people *** and the Ministry of Agriculture Announcement No. 662, the Peking duck, Youxian duck, Liancheng duck, Jianchang duck, Jinding duck, Shaoxing duck, Putian black duck, Gaoyou duck and other varieties of livestock and poultry genetic resources for the protection of varieties.

Duck-related content introduction:

The country's three famous ducks: Gaoyou duck, Peking duck, Shaoxing duck.

All true ducks, with the exception of the cockatoo (shelduck) and sea duck, are sexually mature within the first year and pair up only during the breeding season, unlike swans and geese, which pair up for life. Based on their characteristic behaviors, ducks can be divided into three main groups: drilling ducks, diving ducks, and perching ducks. The mallard is a typical water-drilling duck and is the ancestor of most domestic ducks.

The perching ducks, such as the moscow duck, have long claws and are the most arboreal ducks. Diving ducks (including marine) are the most diverse. Mallards fly from the south to the north in the spring to lay their eggs, then fly south again in the fall to overwinter. They lose their migratory flightiness when they are domesticated by humans, and people don't let them stop laying to hold their eggs in order to get more eggs. Over time, domestic ducks have lost the ability to hatch eggs. Ducks have a 360-degree field of vision in their eyes, so they don't have to turn their heads to see behind them.