For the bluebirds, however, a hundred feet of space is necessary. The birds place a high regard for their territories especially if there are nests inside. Watch out for the materials that you use. The best material to be employed is the wood. If possible, do not use the lumber as it tends to poison the birds once it gets wet. The bluebirds are said to be rare but you could definitely invite them by constructing a bluebird birdhouse for them. Bluebird birdhouses are created specifically for these species because they are known to be really choosy. They do not mingle with the ordinary birds and they are not used to staying in one place because these man-made birdhouses are easily coveted by the other domineering kinds of birds. You can opt for the typical metal cages, all-natural woods or exotic bamboos. You can think up other designs on your own just as long as you know that your birds will be comfortable in them. Creating fancy bird houses are no different from building any other type of structure. You need to come up with a plan first on how it can be constructed. Place an extended roof Provide a roof that is extended of at least two inches in front to protect entrance of the house from raindrops that is usually driven by the wind and also to prevent domesticated animals from getting inside. Also, try to elevate a bit the floor of the bird house from the bottom to prevent rotting which is normally caused by moisture. It's like you're tricking your pet bird that they haven't been taken away from where they live. There are also many styles of bird houses that are made with modern styles and some are older or classics like Victorian styles and etc. Many bird houses are made to look like lighthouses, wood cabins, ark or anything that can birds' living experience much greater. But having to consider their needs first and making other alteration for the design will be your priority. The size of the nest box must be suited to the specific species of birds. Whatever the unique kind of design you want, you need to know their needs; from the size of the hole, size of the house, placement, and other specifications, if it meets their requirements, thinks of its needs first, then you can get a customized design for them.