Can you identify Birds by seeing their Legs ?

A college student needed a small two-hour course to fill his schedule and the only one available was wildlife Zoology. So he joined in and after one week of study, a test was held. The professor passed out a sheet of small paper where in each square was a carefully drawn picture of a bird's legs. No bodies, no feet, just legs.

The test asked each student to identify the birds from their legs. Our student sat and stared at the test getting angrier every minute. Finally he stomped up to the front of the classroom and threw the test on the teacher's desk. "This is the worst test I have ever written."

The teacher looked up and said: "Young man, you have not filled in anything and you definitely have failed the test. Tell me, what's your name?"

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The student pulled up his trousers to the knee showing his legs and said, "You tell me..."