Buckets, wire mesh and PVC pipe are used to build frog traps. Before trapping frogs, determine the species of frog in the area to determine whether they may be legally captured. Some states, such as Iowa, prohibit the use of traps to capture frogs.
To build a basic frog trap, bury a 5-gallon bucket and place a solar- or battery-powered light over the bucket. The top of the bucket should be level with the ground. Check the trap for frogs each morning, and remove the animals that have been caught in the trap.
To trap frogs in the water, construct a standard box-style trap with 1/2-inch wire mesh. The finished trap should measure about 36 inches long, 27 inches wide and 12 inches high. On the interior bottom of the trap, attach PVC to the trap with string to allow the trap to float. The PVC pipe should be glued together in a rectangle using elbows to prevent the trap from sinking. On the top of the trap, attach a solar or battery-powered light. Float the trap on top of ponds or other bodies of water at night to trap frogs. Check and empty the trap each morning.
To trap tree frogs, cut 1 1/2-inch PVC pipe into 3-foot sections and place the pipes in the ground. Empty the pipe into a bucket or bag when the frogs are present, and release or euthanize them according to local regulations.