ostrich / ostriches
cobra / cobras
fox / foxes
horse / horses
baboon / baboons
leopard / leopards
lion / lions
rhinoceros / rhinoceroses
gorilla / gorillas
mouse / mice
chimpanzee / chimpanzees
hippopotamus / hippopotamuses
scorpion / scorpions
camel / camels
zebra / zebras
elephant / elephants
cheetah / cheetahs