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The Tiger Family
Credit: Eric Gevaert | Dreamstime
The beautiful and regal tiger (Panthera tigris) has nine current subspecies, three of which are extinct. Here are the six species that remain — all of which are endangered or critically endangered, according to the International Union for the Conservation of Nature (IUCN) Red List. This photo of two Sumatran tiger cubs taking a rest was taken on Oct. 5, 2010.