Vogelhuisje Wine Cork Birdhouse- I am always on the lookout for new wine cork projects. I seem to have an endless supply on hand!) It would be great for my step-mom who collects birdhouses.
The overhanging roof and extensions of the entrance hole creates a defense against predators. Note that there is also no perch, this stops predators from sitting and reaching in. The birds can easily enter the bird box without the perch so this isn't a problem. The birds nesting inside are guaranteed safety.