Tigers can live in a variety of different ecosystems, including forests, grasslands and swamps. As of 2014, the majority of tigers live in the tropical rainforests of Asia. Historically, they lived in a much wider range of ecosystems across Asia.
Tigers require a habitat with many prey animals, shelter and sources of water. Their primary prey are wild pigs and various species of deer. A single tiger needs to kill and eat around 50 deer-sized animals each year. Tigers are solitary and maintain home territories.
There are six sub-species of tiger alive as of 2014, although the South China tiger has not been seen alive in the wild since the 1970s and may be extinct.