The species with are on the urge of extinction because of critically reduced number of individuals due to indiscriminate killing and due to drastic reduction in their habitats are called endangered species. Common endangered animals are Indian wild ass, Indian ore horned rhinoceros, etc. The species whose populations are gradually reducing and facing the risk of entering into endangered category are known as vulnerable species Rare species are originally small and scattered populations. Hence, these can enter in the category of vulnerable or endangered species any time. Endemic species are found at a proper area and no where else.