An ingenious trap-door for catching House Sparrows that replaces any of the doors on all models of Trio brand martin houses or can be rigged to fit on your own homemade, wooden or metal nest-box trap.
Simply remove the door the sparrow is using and substitute this trap door. Will not fit Heath, Coates, Lonestar, or DuraCraft aluminum martin houses. Comes with bird-removal device. Does not harm the birds. No Trio martin house should ever be erected without one of these useful traps installed.
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