Trap Door for Pigeons Size S

Small trap door, for pigeons and other birds. Made of galvanized metal, resistant to corrosion by water and the elements when exposed to the outside. Designed so that the pigeon sees the entrance in its entirety, being almost impossible to see the trap door, made of two wires, the pigeon accessing through the door, knocking it down without any effort, once inside, the exit is impossible, for a stop that prevents it from folding in the opposite direction. Elaborated, for its installation in any type of home loft, pigsty, etc? built in an artisanal way.