The professor announced that the test would be to look at each of the birds' legs and give the common name, habitat, genus, species, etc. The student looked at each of the birds' legs. They all looked the same to him. He began to get upset. He had stayed up all night studying and now had to identify birds by their legs. The more he thought about it the madder he got. The enraged student pulled up his pants legs and said, "You guess, buddy! You guess!"