Most of the mouths of white ducks are yellow, and a few are either gray-black or brown. Liancheng White Duck has white feathers, black mouth and black feet, and is nicknamed "Black Girl".

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.