It has long been known that the alteration of habitats affects the diversity of bird communities. The degree of change can often be correlated to the magnitude of the alteration. In our southern Appalachian mountains we have what is probably tho least affected of our original woodlillid forests. Examples of the other extreme are the Pd.edmorrt and Coastal Plains which are today little more than a patchwork of monocultures, leaving very little evidence of the original forest biotas.