This cage trap turns your Model TT-SP15 Sparrow Trap Door (sold separately) into a repeating trap. The first sparrow is caught and falls inside the cage trap. Once inside it sings happily and attracts other birds. Trap Door secures to the top with spring clips. It can be hung from the ceiling with provided cable bridle. It also has two funnel style trap doors with "draw bridge" style patios to provide safe entrance for birds. The patios can be hinged up for transport. It has a secure inner chamber that can be stocked with food and water (water bowl included). And a sanitary metal slide-out pan that keeps all food and droppings inside the trap. Trap Door trap can be easily removed by unlatching the spring clips from the slots and sliding the trap forward while closing the top of the cage to eliminate the possibility of any birds escaping.