If positioned just right (and if the nesting birds could read!!), this fully functional birdhouse features a sign post that will point them to four popular birding destinations: Cape May, Key West, Point Reyes and South Padre Island. A removable back wall, drainage, ventilation, an unpainted interior and a 1. 25 ? hole size will invite nesting birds in and keep larger ones out. Item Dimensions: 7. 5? H X 9? X 6. 5? D.