A nesting cavity for birds having a false floor of a screen or perforated material above a sloped floor that terminates at its lowest elevation with exposure to the exterior of the nest cavity. This exposure allows debris, water and nest parasites that fall through the false floor to exit the cavity when natural forces such as gravity act on the materials that reach the sloped floor. Increased ventilation as a result of this exposure aids in lowering moisture inside a nesting cavity and moderates a cavity temperature.
