Metal birdhouses ready to fly away

I have been building some new birdhouses lately. These are constructed from steel and will stand up to all kinds of abuse, from the weather to squirrels to birds. These structures have a hinged door on the back to allow access to the interior. The front, sides and roof are adorned with recycled and found objects. These can be hung or attached to a post, fence or tree. Let me know if you want one.