Fly: parrot, falcon, butterfly, owl
Swim: crocodile, human, shark, seal, whale, bear
Two legs: falcon, human, owl, parrot
Four legs: elephant, crocodile, bear
An owl doesn't swim. It's got two legs.
A crocodile swims. It's got four legs.
A bear doesn't fly. It's got four legs.
A whale swims. It hasn't got any legs.
An elephant doesn't fly. It's got four legs.
A butterfly flies. It's got six legs.