From there, you can get to know their needs, having to specify different kinds of bird houses for different types of species. Building a bird house can affect their needs. The local birds in your area could be blue birds, finches, wrens, cardinals, purple martins, chickadees and other species. From their needs, one of the things you need to adjust or alter is the size of the entrance hole. Apart from the imitating the natural habitat of the birds, natural woods lessens the risks of overheating and poisoning. Processed and treated woods such as plywood contain formaldehyde, a very harmful preservative. These can lead to serious health dangers to your birds. Those lumbers that are categorized as "pressure-treated" has toxic chemicals can also poison the old and nesting birds. This is what makes them choosy when it comes to building their houses. They have a knack to just ignore locations which they think are not safe and are not adhering to what they want. Experts are saying that the best type of bird house to build for blue birds are wooden ones that are situated in rural areas that have open spaces. The only problem you will encounter using this method is the difficulty in choosing what pattern to use. The many patterns presented to you will make your decision hard. It is best to base everything on the location you will build it and the kind of birds that you want to have in the bird house. Different birds have different preference of bird house. Making use of preservatives such as paint or stain outside the bird house can also help enhance the durability of the house. However, chemical preservative should also be avoided. Moreover, never use cans, tins, cartons, and even metal as these materials might overheat and eventually destroy the bird eggs. There are territorial birds that need adequate spacing between other bird houses, often needing 20 to 30 meters of space to prevent them from fighting over their area. You feathered friends can always reward you with their charm and sweet sounds they make. Humans have a large impact on all of the bird species, there are activities which are aimed to expand their natural habitats, but with our need for wood, their natural homes are quickly being diminished with our needs, we can always make alternative homes for them, and careful planning and consideration can always get the best out of your building experience.