The Sumatran tiger (scientific name: Panthera tigris sumatrae) only lives in Sumatra Island, Indonesia, and weighs 100-140 kilograms. [1] It is the smallest tiger species in existence. The color is dark, almost red, and the hair is short, so the muscle outline is obvious and very spectacular. Tigers evolved from carnivorous animals in ancient times. In the early Tertiary Period, there were several branches of ancient carnivorous cats: one was the ancient cheetah, which evolved into the current cheetah throughout various geological periods; one was the ancient saber-toothed cat with highly specialized canine teeth; one was the ancient saber-tooth cat with highly specialized canine teeth; It is a pseudo-saber-toothed cat similar to the ancient saber-toothed cat; the last one is the ancient cat. The ancient saber-tooth cats and pseudo-saber-tooth cats became extinct in the early and late Tertiary Period respectively, while the ancient cats survived. Among them, the ancient tiger-like cats are the ancestors of today’s tigers. Later, the ancient cats were divided into three branches: true cats, dino cats and true saber-toothed cats. Later, both species became extinct during the Quaternary Ice Age. Only the true cats survived and divided into two major groups, the cat clan and the leopard clan, which continue to this day. Todays tiger is a member of the leopard clan.
