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How to catch snails
Find a 12 by 15 inch wooden board.
You can make a simple snail trap with wooden boards that you buy new or repurpose wooden boards you have lying around for the trap. Look for wooden boards that are at least 12 by 15 inches (31 cm by 38 cm).
If you have a lot of snails in your yard, you may go for larger wooden boards to catch more snails. Raise the board off the ground with 1-inch runners.