Purple Martin gourd home is an ideal oasis for mosquito munching martins as well as bluebirds and tree swallows! Establishing a colony of Purple Martins is a natural, safe and chemical-free way to help wipe out mosquito populations. This 9" gourd home features round, crescent and oval entrances so you can attract your favorite birds, a textured non-slip interior, large oval cleanout/inspection port, “dry nest” drainage system, heat and cold regulation and a hanger top that rotates 360 degrees. Comes with round and crescent door plugs. 2 Pack.