An adult tiger can be over 3 metres long from nose to tail. They are heavier than two adults put together. But despite their size, they are amazingly quiet - they can walk through a forest without snapping a single twig, thanks to soft padded paws.
Tigers are great swimmers. Many other cats avoid water, but tigers love it - they will cool off in rivers and even swim across them to reach a new bit of forest. They have webbing between their toes that helps them paddle.
Each tiger has its own area of forest - sometimes as big as a city - which it patrols and protects. It marks the trees around the edge so other tigers know to stay out. Tiger cubs stay with their mum for about two years, learning everything they need to know before going off to find their own home patch.
There are about 350 tigers in Nepal. Around fifteen years ago, there were many fewer. Careful protection by park rangers - including some of the world's first all-women anti-poaching teams - has helped the numbers come back up.