Nest boxes are marketed not only for birds but also for butterflies and other mammals, especially arboreal ones such as squirrels and opossums. Depending on the animal, these boxes may be used for roosting, breeding, bot, or, as in the case with butterflies, hibernation.
Now you can have your own 2-inch-tall birdhouse with a Birdhouse Metal Earth Model Kit. This amazingly detailed DIY model starts as 4" laser-cut square steel sheets and finishes as a beautiful 3D model. Use the easy to follow instructions to pop out the pieces, bend the tabs, and connect them at the attachment points.
Build your own collection of 3D laser-cut models, and create your own metal world!