This Purple Martin Gourd House is outfitted with a Starling Resistant Entrance Hole (1-3/16" high crescent) and a large cleanout access, so nest checks and end of year cleanouts are a breeze. Lid screws off for easy maintenance. Made from gourds over 9" in diameter, they're plenty roomy. No manufactured housing comes close in size. Painted white to reflect the heat of the sun's rays.