This is the fourth in a series of columns on waterfowl where I continue to explore their colorful, and often puzzling, colloquial names. I think it would be fun to plunk down in the Library of Congress, the largest library in the world, and try to find the origins of each of these names. Perhaps that does not sound like fun to you.

MOUNT VERNON — Marty Hanson began carving decoys when he was 10 years old.