Hay bundlers, also known as balers, are agricultural workers who use specialized machinery to compress hay into bales for storage and transport. They typically work on farms and ranches, using a baler to gather hay from the field and compress it into bales of a specific size and shape. The bales are then tied with twine or wire and stored in a barn or other structure until they are needed. Hay bundlers are responsible for ensuring that the hay is properly stored and handled, and that the bales are of a consistent size and shape.