Only 1,000 tigers remain in India, down drastically from 40,000 a century ago, due to extensive hunting and poaching. Two of India's tiger reserves, Panna and Sariska, now have no tigers at all. Poachers serve an insatiable demand for tiger parts in Chinese medicine, while other threats include fences erected by farmers, illegal logging, and fights between male tigers over diminishing territory. There are several subspecies of tigers including the Bengal, Indochinese, Malayan, Sumatran, and now-extinct Bali tiger. The illegal poaching of tigers for their parts and destruction of habitat continue to pose major challenges to saving the remaining wild tigers.