The Night-Hawk, or Piramidig, (Caprimulgus Americanus,) is similar in many points to the Whippoorwill, and the two species were formerly considered identical. The former, however, is a smaller bird; he has no song, and exhibits more of the ways of the Swallow. He is marked by a white spot on his wings, which is very apparent during his flight. He takes his prey in a higher part of the atmosphere,—being frequently seen, at twilight and in cloudy weather, soaring above the house-tops in quest of insects. The Whippoorwill finds his subsistence chiefly in the woods, and takes a part of it from the branches of trees, while poising himself on the wing, like a Humming-Bird. I believe he is never seen circling aloft like the Night-Hawk.
The movements of the Night-Hawk, during this flight, are performed, for the most part, in circles, and are very picturesque. The birds are usually seen in pairs, at such times, but occasionally there are numbers assembled together; and one might suppose they were engaged in a sort of aërial dance, or that they were emulating each other in their attempts at soaring to a great height. It is evident that these evolutions proceed in part from the pleasure of motion; but they are also connected with their courtship. While they are soaring and circling in the air, they occasionally utter the shrill and broken note which has been supposed to resemble the word Piramidig, whence the name is derived,—and now and then they dart suddenly aside, to seize a passing insect.
While performing these circumvolutions, the male frequently dives almost perpendicularly downwards, a distance of forty feet or more, uttering, when he turns at the bottom of his descent, a singular note, resembling the twang of a viol-string. This sound has been supposed to proceed from the action of the air, as the bird dives swiftly through it with open mouth; but this supposition is rendered improbable by the fact that the European species makes a similar sound while sitting on its perch. It has also been alleged that the diving motion of this bird is an act designed to intimidate those who seem to be approaching his nest; but this cannot be true, because the bird performs the manoeuvre when he has no nest to defend. This habit is peculiar to the male, and it is probably one of those fantastic motions which are noticeable among the males of the gallinaceous birds, and are evidently their artifices to attract the attention of the female; very many of these motions may be observed in the manners of tame Pigeons.
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.
No person could watch this playful flight of the Woodcock without interest; and it is remarkable that a bird with short wings and difficult flight should be capable of mounting to so great an altitude. It affords me a vivid conception of the pleasure with which I should witness the soaring and singing of the Skylark, known to me only by description. I have but to imagine the chirruping of the Woodcock to be a melodious series of notes, to feel that I am listening to that bird, which is so familiarized to our imaginations by English poetry that in our early days we always expect his greetings with a summer sunrise. It is with sadness that we first learn in our youth that the Skylark is not an inhabitant of the New World; and our mornings seem divested of a great portion of their charms, for the want of this poetical accompaniment.
There is another circumstance connected with the habits of the Woodcock which increases his importance as an actor in the melodrame of Nature. When we stroll away from the noise and din of the town, where the stillness permits us to hear distinctly all those faint sounds which are turned by the silence of night into music, we may hear at frequent intervals the hum produced by the irregular flights of the Woodcock, as he passes over short distances in the wood, where he is collecting his repast. It resembles the sound of the wings of Doves, rendered distinct by the stillness of all other things, and melodious by the distance. There is a feeling of mystery attached to these musical nights that yields a savor of romance to the quiet voluptuousness of a summer evening.
It is on such occasions, if we are in a moralizing mood, that we may be keenly impressed with the truth of the saying, that the secret of happiness consists in keeping alive our susceptibilities by frugal indulgences, rather than by seeking a multitude of pleasures, that pall in exact proportion to their abundance. The stillness and darkness of a quiet night produce this enlivening effect upon our minds. Our susceptibility is then awakened to such a degree, that slight sounds and feeble sparks of light convey to our souls an amount of pleasure which we seldom experience in the daytime from sights and sounds of the most pleasing description. Thus the player in an orchestra can enjoy such music only as would deafen common ears by its crash of sounds, in which they perceive no connection or harmony; while the simple rustic listens to the rude notes of a flageolet in the hands of a clown with feelings of ineffable delight. Nature, if the seekers after luxurious and exciting pleasures could but understand her language, would say to them, "Except ye become as this simple rustic, ye cannot enter into my paradise."