Scientific name Northeast Black Aoxia

Latin name Cambaroidesdauricus

Also known as: Changbai Mountain lobster, grass lobster, water crab, _ crab clip, _ _ crab clip.

Classification of Animal Kingdom-Arthropoda-Crustacea-Decapoda-Reptilia-_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Originated from Changbai Mountain in Jilin Province, China, the tributary of Hunjiang River in Yalu River was the most abundant, and then extended to Heilongjiang and some water systems in North Korea. The wild black crayfish in Northeast China is now endangered. living environment

_ They are cold-water habitats and live in stony waters such as rivers and streams with clear water quality and no pollution. It is extremely demanding on water quality, sensitive to pesticides and chemicals, and a slight pollution can cause its death. At present, due to the extensive use of pesticides in rice fields in recent years, the living area of _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Only in the northeast forest region, in some unpolluted rivers or streams, can you see it occasionally. Biological characteristics

_ A small lobster-like bird, with its first pair of claws, whiskers on both sides of its mouth and two sharp needles, lives in unpolluted fresh water and is the intermediate host of paragonimiasis. _ The ostrich is an omnivore, feeding mainly on tiny microorganisms, insects and fresh moss, as well as small fish tadpoles and molluscs in the river. In winter, we also eat overwintering wood frogs. When hiding, you usually dive under the stone, and sometimes you get into holes in the soil and roots. Occasionally surfaced. Backward stroke by tail when walking. Move in the opposite direction to the head. _ The growth of the ostrich is realized by molting its shell, and it grows a circle every time it is molted. The returned shell is soft and shaped. Because of poor eyesight and fear of light, it is slow to move, and it is often easy to be caught by people or animals because it is too late to dodge. The meat of _ e is tender, white and rich in nutrition.

Crayfish is a kind of crustacean that lives in fresh water, and its scientific name is Procambarus clarkii, also known as red crayfish or freshwater crayfish. Procambarus clarkii is the most widely distributed invasive species in crustaceans. Procambarus clarkii has an absolute competitive advantage in the local ecological environment because of its omnivorousness, fast growth and strong adaptability. Its feeding range includes aquatic plants, algae, aquatic insects, animal carcasses, etc. When food is scarce, it also kills each other.