There is no gray swan in the world

There are five kinds of swan around the world. They are: black swan and black-necked swan. There are three types of white swan: big swan, small swan and swan. Except that the black swan is a non-protected animal, the other four are all secondary protection animals. Because of its migratory habits, the big swans and cygnets can rarely breed eggs artificially. The swan swan has artificially grown in recent years, producing a nest of 4-6 eggs a year.
In recent years, some swan breeders asked whether grey swan is a swan species. There is no grey swan in the world. From the current understanding, it should be France Lande goose instead of a swan. Landes goose is used to feed foie gras, and foie gras is a French dish used in general western restaurants. French Langde goose gray, orange yellow mouth, legs thick and short, weighing about 10-15 per year from October to May next year eggs, egg production is generally about 40-50. French Langde Goose is now about 10-20 yuan in price for domestic seedlings, and the goods Langde goose is about 7-9 yuan per catty. Generally, each one can sell 70-100 yuan. Fat liver products (1.5 kg -1.8 kg) is priced at 100-130 yuan.
In addition, there is a swan on the Internet, said one, in fact, is the French Muscovy duck, in China, especially south of the Yangtze River, has been introduced to breeding for several decades, and has a large screen farming. The price of each catty is 6-8 yuan. The color of French Muscovy Duck is black, white, and black and white. It weighs about 5-10 pounds. There are red sarcomas on the nose of the male.
In fact, the difference is whether the swan can see the length of its head and neck, and the true swan neck is longer than the body.
From the point of view of artificial breeding, because the white swan cannot produce eggs, it can only be used for viewing. The breeding of black swan can not only watch, but also breed eggs, and provide the market with swan meat, the future is broad.

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