What is the biggest cat on Earth?

The Amur leopard (Panthera pardus orientalis) is the largest cat in the world, with males averaging 106 to 136 cm (42 to 54 inches) in length, and weighing 40–75 kg (88–165 lb).

However, it's important to note that:

* The Amur leopard is critically endangered. Its population is estimated to be under 100 individuals.

* Tigers can also be very large, and the Siberian tiger (Panthera tigris altaica) is the largest of the tiger subspecies. It can be heavier than the Amur leopard, but is typically slightly shorter in length.

So, while the Amur leopard is the longest cat, the Siberian tiger could be the heaviest.