The WCS Wooden Sparrow Trap Birdhouse is the perfect tool for control of pesky sparrows, whether they are in an enclosed space, robbing your bird feeder, or invading bluebird boxes. It looks like any other birdhouse but conceals a hidden trap! Inside is a spring-loaded door that snaps shut when a sparrow enters and lands on a perch positioned beneath the opening. The door has a fluorescent orange sticker affixed to it so you can tell when the door is closed. The opening in the trap measures 1.25 inches, which is a perfect size for sparrows. Overall trap dimensions are 9’H x 5’W x 5.5’D, and each one includes a mounting bracket and detailed instructions.