1. Normal species: species whose population levels are considered to be normal for their survival. for example:- cattle, sal , pine, rodents, etc.
2. 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.
3.vulnerable species : these are spieces 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. for example :- blue ship
4. Rare species : species with small population may move into the endangered or vulnerable category if the negative factors effecting them continue to operate.