Hippopotamus are largely herbivores, native to sub-Saharan Africa. They are not social in nature and mark their territories in water. A recent estimate suggests that over the past 10 years there has been a 7–20 per cent decline in their population (Photo credit: Vikas Choudhary) The Great Hornbill is a spectacular forest bird found in northeast India. It is threatened by habitat loss and hunting, in spite of being crucial to the ecosystem (Credit: Vikas Choudhary)The gharial is a native animal of India, given the Leopards are widely distributed across the Indian subcontinent and are classified as Royal Bengal Tigers are endangered, with the population of 2,500 in India (Credit: Vikas Choudhary) The Painted Stork is native to India. Its population is declining all over the world (Credit: Vikas Choudhary)