BIRD LEGS

        A young college student had stayed up all night studying for his
zoology test the next day.  As he entered the classroom, he saw ten
stands with ten birds on them with a sack over each bird and only the
legs showing.  He sat right on the front row because he wanted to do the
best job possible.  The professor announced that the test would be to
look at each set of bird legs and give the common name, habitat, genus,
species, etc.
        The student looked at each set of bird 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.  Finally, he could stand it no
longer.  He went up to the professor's desk and said, "What a stupid
test!  How could anyone tell the difference between birds by looking at
their legs?"  With that the student threw his test on the professor's
desk and walked out the door.
        The professor was surprised.  The class was so big that he
didn't know every student's name, so as the student reached the door the
professor called, "Mister, what's your name?'
        The enraged student pulled up his pant legs and said, "You
guess, buddy!  You guess!"