Answer:
Classification of
species of animals and plants:
(i) Normal
Species: Species whose population levels are considered to be normal for their
survival are normal species.
Examples:
Cattle, sal, pine, rodents, etc.
(ii)
Endangered Species: These are species which are in danger of extinction. The
survival of such species is difficult if the negative factors that have led to
a decline in their population continue to operate.
Examples:
Black buck, crocodile, Indian wild ass, Indian rhino, lion tailed macque, etc.
(iii)
Vulnerable Species: These are species whose population has declined to levels
from where it is likely to move into the endangered category in the near
future, if the negative factors continue to operate.
Examples:
Blue sheep, Asiatic elephant, Gangetic dolphin, etc.
(iv)
Rare Species: Species with small population may move into the endangered or
vulnerable category if the negative factors affecting them continue to operate.
Examples:
Himalayan brown bear, wild Asiatic buffalo, desert fox, hornbill, etc.
(v)
Endemic Species: These are species which are only found in some particular areas
usually isolated by natural or geographical barriers.
Examples:
Andaman teal, Nicobar pigeon, Andaman wild pig, mithun in Arunachal
Pradesh.
(vi)
Extinct Species: 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:
Asiatic cheetah, pink head duck.
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