Spencer Trotter, Popular Science Monthly (1909)
“ Man appears in a new land, clears its face of timber and builds his home. By and by birds from the distant prairie lands find their way into his fields. The swift forsakes the hollow tree to build in the settler's chimney, and the swallow leaves the overhanging tree-trunk and rocky ledge for the shelter of the eaves and barn. The robin nests within handreach of the door-sill, and the wren and martin, leaving their old homes in the forest to some woodpecker more lazy than his fellows, scold and quarrel for the possession of any hole or box so long as it is near the dwelling places of men. ”
