The Pileated Woodpecker is a denizen of extensive forests. It will adapt itself to second growth, particularly where the young trees have sprung up about some remnant of the old, but in any case it requires wide areas. As forests dwindle to woodlots, along with the wild turkey, the barred owl, and the raven, it disappears. From regions once forested but now devoted to agriculture it is gone. In the mountains, however, in the marginal areas, where wooded ridges extend out to the plains, and in forested swamp lands, it continues.
Arthur Cleveland Bent
Life Histories of North American Woodpeckers