Endangered
An animal on the endangered species list means that the animal is close to becoming extinct. Extinct means that the animal can not be found anywhere. The animal will not long be found in the wild or in the zoo. The animal no longer living anywhere. Here are the Big Cats that are in the endangered species list are the Tiger, Snow Leopard, Cheetah, and Lion. (Wikipedia) (National Geographic)
Threatened
An animal on the threatened species list means that the animal is being threatened of becoming endangered. The animal is becoming less common in the wild. The animal can still be found in the wild, but is becoming harder to find. Big Cats on the threatened list are Lynx, Ocelot, Jaguars, Clouded Leopard, and Leopard. (Wikipedia) (National Geographic)
Least Concerned
An animal on the least concerned list is an animal that is doing well in the wild. This means that there is no treat to the animal. It means they are doing well in the wild and finding enough food to feed themselves. Least concerned Big Cats can be found in both the wild and in the zoo. Big Cats on the least concerned are Cougar, Caracal, and Bob Cat. (Wikipedia) (National Geographic)