Endangered organisms

1, Trionyx sinensis: It lives in rivers and lakes and is benthic. Feeding on aquatic animals. Oviposition turtle is a national first-class protected animal in China, which is extremely rare and precious. It is one of the most endangered species among sea turtles. There are only three known living species in the world: 1 in Suzhou Zoo, 1 in Tongmo Lake, Vietnam, and 1 in Xuanhan Lake, Vietnam.

2. Star Turtle in Myanmar: Overutilization and exploitation of its habitat, as well as its capture as food and medicine by human beings, make the star turtle in Myanmar a more endangered species than the radial turtle and the Angolan elephant turtle. The number of individuals in nature may be less than 250, and now they are extremely endangered animals.

3. Helan pika: It is only distributed at the top of Helan Mountain at the junction of Ningxia and Inner Mongolia, and its distribution range is extremely limited. This is unique to China. There are so few pikas in Helan Mountain that even their 1 full-body photos are hard to find.

Extended data:

Species specialization and genetic failure are often the internal causes of species endangerment or even extinction. In the long-term evolution process, some kinds of wild animals have adapted to specific habitats, resulting in special habits (including feeding habits), which makes it difficult for them to adapt to the changed environment or other environments, and finally leads to the end of "unsuitable being eliminated".

Each species is an important member of the ecosystem, and through the relationship of food chain, species play the role of interdependence and mutual containment. Once a link in the food chain goes wrong, the balance of the whole ecosystem will be seriously affected.

Baidu encyclopedia-tortoise

Baidu Encyclopedia-Burmese Star Turtle

Baidu Encyclopedia-Helanshan pika