Today, there are only seven species of big cats that survived from what was—about 25 million years ago—a remarkably diverse group of large felid carnivores. These seven living species are classified into three groups that include the Panthera, Felis, and Acinonyx. Each species is quite unique and can be distinguished from the others by their different body size, behaviors, and appearance.
1.Tiger - Panthera tigris is the largest cat species, reaching a total body length of up to 3.3 metres (11 ft) and weighing up to 306 kg (670 lb). It is the third largest land carnivore (behind only the Polar bear and the Brown bear).
While Tiger's won’t attack people unless provoked or hungry, clashes are common enough. Recently the issue has become even more common as human encroachment and deforestation means the shrinking habitat of the tiger frequently extends into populated areas. They are immensely strong and deadly predators. Treat them with the respect they deserve.
Its most recognizable feature is a pattern of dark vertical stripes on reddish-orange fur with lighter underparts. It has exceptionally stout teeth, and the canines are the longest among living felids with a crown height of as much as 74.5 mm (2.93 in) or even 90 mm (3.5 in).
They are territorial and generally solitary but social animals, often requiring large contiguous areas of habitat that support their prey requirements. This, coupled with the fact that they are indigenous to some of the more densely populated places on Earth, has caused significant conflicts with humans.