The Bengal tiger or the Royal Bengal tiger (Panthera tigris tigris) is found in parts of India, Bangladesh, Nepal, Bhutan and Burma. It lives in varied habitats: grasslands, subtropical and tropical rainforests, scrub forests, wet and dry deciduous forests and mangroves. Males in the wild usually weigh 205 to 227 kg (450–500 lb), while the average female will weigh about 141 kg. However, the northern Indian and the Nepalese Bengal tigers are supposed to be somewhat bulkier than those found in the south of the Indian Subcontinent, with males averaging around 520 lbs (236 kg). While conservationists suspected the population was below 2,000,the most recent audit by the Indian Government's National Tiger Conservation Authority has estimated the number at 1411 wild tigers (1165-1657 allowing for statistical error), a drop of 60% in the past decade.Since 1972, there has been a massive wildlife conservation project known as Project Tiger underway to protect the Bengal tiger. The project is considered as one of the most successful wildlife conservation programs, though at least one Tiger Reserve (Sariska Tiger Reserve) has lost its entire tiger population to poaching.