“Having no song, the cry of Skirk-skirk! given when on the wing, has a wild and eerie sound which is often followed by a booming noise of the quality that can be imitated by placing tissue-paper over a long, coarse comb and then blowing rapidly across it from one end to the other. This noise is made by the rush of the wind through the wing quills as the bird drops through the air after its winged food. “The Nighthawk builds no nest, but lays its eggs on a bare rock in a field, amid the stones of rocky ground, on roofs even of city houses. Again does colour protection aid a bird, for the arrangements of its markings blend the Nighthawk with granite as perfectly as those of the Whip-poor-will conceal it in the woods. “The Nighthawk, whose erratic flight makes it a target that piques the skill of a certain class of sportsmen, has frequently been shot at for prowess, the excuse being that it ‘wasn’t any good, anyway.’ Aside from the list of insects harmful to agriculture and domestic animals that it destroys, let us remember its crowning virtue, and cry ‘Hands off!’ It kills mosquitoes, and has thus earned the local name of Mosquito-hawk. “It is hard to believe that any one should insist that the Nighthawk and the Whip-poor-will are one and the same bird, but such has been the case, and among intelligent people also, though the mistake has been definitely settled by one of the Wise Men. A NIGHTHAWK INCIDENT A discussion of the specific distinctness of the Whip-poor-will and Nighthawk, following an address to Connecticut agriculturists some years ago, led to my receipt, in July, 1900, of an invitation from a gentleman who was present, to come and see a bird then nesting on his farm that he believed combined the characters of both the Whip-poor-will and Nighthawk; in short, was the bird to which both these names applied. [Illustration: NIGHTHAWKS] Here was an opportunity to secure a much-desired photograph, and armed with the needed apparatus, as well as specimens of both the Nighthawk and Whip-poor-will, I boarded an early train for Stevenson, Connecticut, prepared to gain my point with bird as well as with man.