If you are an confident woodworker with some building experience, you may even feel comfortable designing your own bird house with the information you've learned about what nesting birds want. If you are a novice, however, building a bird house from scratch may seem too intimidating or ambitious, even with detailed plans. In that case, you may want to consider using a bird house kit with pre_cut pieces to assemble. Another option is to start with a simple bird house and make modifications to the design to make it more bird_friendly to suit the species you hope will take up residence.
Unwanted Tenants. Don't let your birdhouses become homes for Starlings or House Sparrows! These birds were introduced into the contiguous United States from Europe during the mids and early 1900s. Both species spread throughout North America and have become serious agricultural and urban pests. In addition, both species compete with native North American birds for cavity_nest sites and thus may harm native bird populations. For example, nest site competition by Starlings and House Sparrows has been blamed, in part, for the population declines of the Eastern Bluebird, a cavity_nesting bird.