The largest species of cat is the Siberian tiger, also known as the Amur tiger. Adult males can weigh up to 600 pounds and measure over 10 feet in length, including their tails. These majestic big cats are primarily found in the forests of Eastern Russia and parts of China. The Siberian tiger is known for its strength, agility, and distinctive orange-black striped coat. Due to habitat loss and poaching, they are classified as endangered, prompting conservation efforts to protect their populations.