The twanging note produced during the precipitate descent of the Night-Hawk is one of the picturesque sounds of Nature, and is heard most frequently in the morning twilight, when the birds are busy collecting their repast of insects. During an early morning walk, while they are circling about, we may hear their cry frequently repeated, and occasionally the booming sound, which, if one is not accustomed to it, and is not acquainted with this habit of the bird, affects him with a sensation of mystery, and excites his curiosity in an extraordinary degree.
The sound produced by the European species is a sort of drumming or whizzing note, like the hum of a spinning-wheel. The male commences this performance about dusk, and continues it at intervals during a great part of the night. It is effected while the breast is inflated with air, like that of a cooing Dove. The Piramidig has the power of inflating himself in the same manner, and he utters this whizzing note when one approaches his nest.
The American Woodcock (_Scolopax minor_) is a more interesting bird than we should infer from his general appearance and physiognomy. He is mainly nocturnal in his habits, and his ways are worthy of study and observation. He obtains his food by scratching up the leaves and rubbish that lie upon the surface of the ground in damp and wooded places, and by boring into the earth for worms. He remains concealed in the wood during the day, and comes out to feed at twilight, choosing the open ploughed lands where worms are abundant; though it is probable that in the shade of the wood he is more or less busy in scratching among the leaves in the daytime.
The Woodcock does not commonly venture abroad in the open day, unless he be disturbed and driven from his retreats. He makes his first appearance here in the latter part of April, and at this season we may observe that soaring habit which renders him one of the picturesque objects of Nature. This soaring takes place soon after sunset, continues during twilight, and is repeated at the corresponding hour in the morning. If you listen at this time near the places of his resort, he will soon reveal himself by a lively peep, frequently uttered, from the ground. While repeating this note, he may be seen strutting about, like a turkey-cock, with fantastic jerkings of the tail and a frequent bowing of the head; and his mate, I believe, is at this time not far off. Suddenly he springs upward, and with a wide circular sweep, uttering at the same time a rapid whistling note, he rises in a spiral course to a great height in the air. At the summit of his ascent, he hovers about with irregular motions, chirping a medley of broken notes, like imperfect warbling. This continues about ten or fifteen seconds, when it ceases, and he descends rapidly to the ground. We seldom hear him while in his descent, but receive the first intimation of it by hearing a repetition of his peep, resembling the sound produced by those minute wooden trumpets sold at the German toy-shops.