The range of the Night Hawk, also known as "Bull-bat," "Mosquito Hawk," "Will o' the Wisp," "Pisk," "Piramidig," and sometimes erroneously as "Whip-poor-will," being frequently mistaken for that bird, is an extensive one. It is only a summer visitor throughout the United States and Canada, generally arriving from its winter haunts in the Bahamas, or Central and South America in the latter part of April, reaching the more northern parts about a month later, and leaving the latter again in large straggling flocks about the end of August, moving leisurely southward and disappearing gradually along our southern border about the latter part of October. Major Bendire says its migrations are very extended and cover the greater part of the American continent. The Night Hawk, in making its home, prefers a well timbered country. Its common name is somewhat of a misnomer, as it is not nocturnal in its habits. It is not an uncommon sight to see numbers of these birds on the wing on bright sunny days, but it does most of its hunting in cloudy weather, and in the early morning and evening, returning to rest soon after dark. On bright moonlight nights it flies later, and its calls are sometimes heard as late as eleven o'clock. "This species is one of the most graceful birds on the wing, and its aerial evolutions are truly wonderful; one moment it may be seen soaring through space without any apparent movement of its pinions, and again its swift flight is accompanied by a good deal of rapid flapping of the wings, like that of Falcons, and this is more or less varied by numerous twistings and turnings. While constantly darting here and there in pursuit of its prey," says a traveler, "I have seen one of these birds shoot almost perpendicularly upward after an insect, with the swiftness of an arrow. The Night Hawk's tail appears to assist it greatly in these sudden zigzag changes, being partly expanded during most of its complicated movements." Night Hawks are sociable birds, especially on the wing, and seem to enjoy each other's company. Their squeaking call note, sounding like "Speek-speek," is repeated at intervals. These aerial evolutions are principally confined to the mating season. On the ground the movements of this Hawk are slow, unsteady, and more or less laborious. Its food consists mainly of insects, such as flies and mosquitos, small beetles, grasshoppers, and the small night-flying moths, all of which are caught on the wing. A useful bird, it deserves the fullest protection.