PD Photo: Sumatran Tiger (Panthera tigris sumatrae), photographed on August 30, 2007 by Dick Mudde in Diergaarde Blijdorp (Stichting Koninklijke Rotterdamse Diergaarde, Foundation Royal Zoo of Rotterdam, one of the oldest zoos in the Netherlands).
The Sumatran tiger (Panthera tigris sumatrae), a subspecies of tigers found on the Indonesian island of Sumatra, have unique genetic markers, which isolate Sumatran tigers from all other mainland subspecies of tigers. The Sumatran tiger is only found naturally in Sumatra, a large island in western Indonesia. The smallest of all surviving tiger subspecies, the male Sumatran Tiger has average 204 cm (6 feet 8 inches) length and weigh about 136 kg (300 lb) and tigresses of this subspecies average 198 cm (6 feet 6 inches) in length weighing about 91 kg (200 lb). They have webbing between their toes that help Sumatran tigers swim very fast.