For example, we might say that cheetahs are one of the fastest land animals that we know of... because we know that's just running speed, not flying or snapping jaws shut or things like that.
Farmers are being taught how to protect their animals without killing cheetahs, and people are trying to protect the places that cheetahs live and the animals they eat so that they will have healthy habitats to live in.
So for example, if you're out (in the) Serengeti, you might see some Thomson's gazelles grazing about, and you might see a cheetah kind of in the background, which is one of their natural predators.
The cheetah is the fastest land animal on Earth. It can reach a running speed of 60 miles an hour in just three seconds. That's as fast as a sports car.