Abstract: A false floor for a bird nesting/feeding box, bearing on at least one of the inner side walls for support, conveniently adjustable to various depths by hand, and, being of minimal thickness, capable of remaining permanently within the bird box even when desirable to lower the bird nest protectively to distance it from the bird entry hole through which predators insert body parts to seize nest contents. The invention permits improved drainage, ventilation, parasite control, and more convenient and thorough cleaning. The invention permits more convenient adapting of a nesting box to a feeding box.

Abstract: A trap for a birdhouse, the moving parts of which are attachably and detachably integrated with bearing, aligning, and attaching features which are permanently part of the birdhouse entry hole panel, achieving reduction of trap structure and greater convenience of use. A pivoting gate is set above the entry hole within the birdhouse, and is retained there by a trip assembly. A bird entering the birdhouse, and alighting on the trigger extension of the rotatable trip assembly, caseus the trip assembly to disengage from the free end of the pivoting gate, which falls, blocking the entry hole ad trapping the bird within. The trap includes a structure to facilitate removal of the trapped bird. The trap has structure to allow an option of sensitive or stable trap settings.