CBSE
Class 10
Class 12
India is very rich in biological diversity. There are variety of plants and animals found in our country. India has nearly 8% of total number of species found in the world. About 81,000 species of fauna (animals) and 47,000 species of flora (plants) are found in India. India is famous for rhino, elephant, tiger, lion, monkey, snakes, peacock etc.
Population of these species become so small that they come under danger of extinction. If negative factors continue, they may become extinction. Example : Indian rhino, black buck, crocodile, Indian wild ass etc.
The species that are found only in a particular region and are isolated by natural barriers are called endemic species. Examples of such species are the Andaman teal, Nicobar pigeon, Andaman wild pig, mithun in Arunchal Pradesh.
These are species which are not found after searches of known or likely areas where they may occur. A species may be extinct from a local area, region, country, continent or the entire earth. Examples of such species are the Asiatic cheetah, pink head duck.
Species whose population levels are considered to be normal for their survival, such as cattle, sal, pine, rodents, etc.
Species with small population is called rare. They are rarely seen in the forest. Example – Himalayan brown bear, wild Asiatic buffalo, desert fox and hornbill etc.
Population of these species decreases to such an extent that they may become endangered. Example: Blue sheep, Asiatic elephant etc.