An animal occupancy structure can include a vent, a cover and a base. The cover can include a planar surface and a cylindrical collar formed to extend perpendicularly from the planar surface and define an orifice therein. The vent can be coupled with the collar and is rotatable between a closed position in which the vent fully surrounds the collar and is nearest the planar surface, and an open position in which the vent only partially surrounds the collar and is spaced away from the planar surface. The base can be detachably coupled with the cover at a peripheral edge of the base and the cover. The base can include a uniformly concaved inner surface extending radially to the peripheral edge of the base to form an interior chamber between the base and the cover.