The ROUGH-WINGED SWALLOW resembles the bank swallow so closely that it is difficult to distinguish them, unless one can see the darker breast and throat of the rough-wing and the absence of a dark band across the breast. Upon careful examination of the latter species, each long outer wing-feather is discovered to have a rough saw-tooth edge. The habits of the birds are similar, though the rough-wings, like phoebes, nest not only in banks, but against stone walls and stone bridges. They have a more restricted range than barn swallows. They breed from southern Canada to northern Florida and southern California, and winter in Mexico and Central America. |