Giant cougar

The giant cougar is a large species of little cat related to a common cougar. They evolved from a group of cougar relatives around 2,000 years BC to replace the native lions due to the extinction of the native American lions, one way was by growing larger than most other cougar relatives, about the size of a large Bengal/Siberian tiger hybrid, another is by growing stronger jaws, teeth, and bodies to take down larger prey such as the bison. Giant cougars are carnivorous, just like most other cat species, preying on not just bison, but also horses (wild and domestic), camelids (dromdaries, llamas, alpacas, guanacos, vicunas, etc), tapirs, young/baby elephants, baby mammoths, antelopes, pronghorns, native and nonnative wild sheep/goats (mouflons, dall sheep, bighorn sheep, bharal, tahrs, mountain goats, takins, muskoxen, etc), domestic sheep/goats, cattle (buffaloes, bison, yaks, wild aurochs, domestic cattle, etc), and many small and medium-sized prey animals. They are indigenous to the grasslands and forests across Eastern and Western United States, but also in Mexico, but are absent in Canada and Alaska due to freezing cold that giant cougars are not adapted to, unlike their smaller common cougar cousins.