Bait the trap by spreading food around the doorway and under the trap. The funnel type door is 8" wide by 7" tall, allowing easy entry. Once inside, the pigeon is unable to get back out. The trap is always set and never needs to be reset. The overall size is 36" long, 19" wide and 9" high. The wire is 1" x 1", 16 gauge galvanized and is powder paint coated, which protect the finish for longer life. There is a door on the top of the trap for easy removal of birds.