In their natural habitat they would nest in crevices and cavities in trees, rocks, or cactus. They will also take over old woodpecker cavities. Nowadays there is just not much habitat left so they are closely associated with breeding in areas where h...
Any moving company has them and sells them by the stack.
If you are interested in decorating them and using as storage bins I have a link that might help you. It isn't exactly how to decorate diaper boxes (it's for the empty wipe boxes, however, since you have diaper boxes, you probably have a lot of empty...