The American Snipe has some of the nocturnal habits of the Woodcock, and the same habit of soaring at twilight, when he performs a sort of musical medley, which Audubon has very graphically described in the following passage:—"The birds are met with in meadows and low grounds, and, by being on the spot before sunrise, you may see both (male and female) mount high, in a spiral manner, now with continuous beats of the wings, now in short sailings, until more than a hundred yards high, when they whirl round each other with extreme velocity, and dance, as it were, to their own music; for, at this juncture, and during the space of five or six minutes, you hear rolling notes mingled together, each more or less distinct, perhaps, according to the state of the atmosphere. The sounds produced are extremely pleasing, though they fall faintly on the ear. I know not how to describe them; but I am well assured that they are not produced simply by the beatings of their wings, as at this time the wings are not flapped, but are used in sailing swiftly in a circle, not many feet in diameter. A person might cause a sound somewhat similar by blowing rapidly and alternately, from one end to another, across a set of small pipes, consisting of two or three modulations. This performance is kept up till incubation terminates; but I have never observed it at any other period."
Among the Heron family we discover a few nocturnal birds, which, though not very well known, have some ways that are singular and interesting. Goldsmith considered one of these birds worthy of introduction into his "Deserted Village," as contributing to the poetic conception of desolation. Thus, in his description of the grounds which were the ancient site of the village, we read,—
"Along its glades, a solitary guest,
The hollow-sounding Bittern guards its nest."
"The Bittern is a shy and solitary bird; it is never seen on the wing in the daytime, but sits, generally with the head erect, hid among the reeds and rushes of extensive marshes, from whence it will not stir, unless disturbed by the sportsman. When it changes its haunts, it removes in the dusk of the evening, and then, rising in a spiral direction, soars to a vast height. It flies in the same heavy manner as the Heron, and might be mistaken for that bird, were it not for the singularly resounding cry which it utters, from time to time, while on the wing: but this cry is feeble when compared with the hollow booming noise which it makes during the night, in the breeding season, from its swampy retreats. From the loudness and solemnity of its note, an erroneous notion prevails with the vulgar, that it either thrusts its head into a reed, which serves as a pipe for swelling its note beyond its natural pitch, or that it immerges its head in water, and then produces its boomings by blowing with all its might."
The American Bittern is a smaller bird, but is probably a variety of the European species. It exhibits the same nocturnal habits, and has received at the South the name of Dunkadoo, from the resemblance of its common note to these syllables. This is a hollow-sounding noise, but not so loud as the voice of the Bittern to which Goldsmith alludes. I have heard it by day proceeding from the wooded swamps, and am at a loss to explain how so small a bird can produce so low and hollow a note. Among this family of birds are one or two other nocturnal species, including the Qua-Bird, which is common to both continents; but there is little to be said of it that would be interesting in this connection. The Herons, however, and their allied species, are birds of remarkable habits, the enumeration and account of which would occupy a considerable space. In an essay on the flight of birds in particular, the Herons would furnish a multitude of very interesting facts.
Let us now turn our attention to those diurnal birds that sing in the night as well as in the day, and which might be comprehended under the general appellation of Nightingales. These birds do not confine their singing to the night, like the true nocturnal birds, and are most vocal when inspired by the light of the moon. Europe has several of these minstrels of the night. Beside the true Philomel of poetry and romance, the Reed-Thrush and the Woodcock are of this character. In the United States, the Mocking-Bird enjoys the greatest reputation; the Rose-breasted Grosbeak and the New York Thrush are also nocturnal songsters.
The Mocking-Bird (Turdus polyglottus) is well known in the Middle and Southern States, but seldom passes a season in New England, except in the southern part of Rhode Island and Connecticut, which seem to be the northern limit of its migrations. Probably, like the Rose-breasted Grosbeak, which is constantly extending its limits in an eastern direction, the Mocking-Bird may be gradually making progress northwardly, so that fifty years hence both of these birds may be common in Massachusetts. The Mocking-Bird is familiar in his habits, frequenting gardens and orchards, and perching on the roofs of houses when singing, like the common Robin. Like the Robin, too, who sings at all hours excepting those of darkness, he is a persevering songster, and seems to be inspired by living in the vicinity of man. In his manners, however, he bears more resemblance to the Red Thrush, being distinguished by his vivacity, and the courage with which he repels the attacks of his enemies.
The Mocking-Bird is celebrated throughout the world for his musical powers; but it is difficult to ascertain precisely the character and quality of his original notes. Hence some naturalists have contended that he has no song of his own, but confines himself to imitations. That this is an error, all persons who have listened to him in his native wild-wood can testify. I should say, from my own observations, not only that he has a distinct song, peculiarly his own, but that his imitations are far from being equal to his original notes. Yet it is seldom we hear him except when he is engaged in mimicry. In his native woods, and especially at an early hour in the morning, when he is not provoked to imitation by the voices of other birds and animals, he sometimes pours forth his own wild notes with full fervor. Yet I have often listened vainly for hours to hear him utter anything but a few idle repetitions of monotonous sounds, interspersed with some ludicrous varieties. Why he should neglect his own pleasing notes, to tease the listener with his imitations of all imaginable discords, is not easily explained.
Though his imitations are the cause of his notoriety, they are not the utterances upon which his true merit is based. He would be infinitely more valuable as a songster, if he were incapable of imitating a single sound. I would add, that as an imitator of the songs of other birds he is very imperfect, and in this respect has been greatly overrated by our ornithologists, who seem to vie with one another in their exaggerations of his powers. He cannot utter the notes of the rapid singers; he is successful only in his imitations of those birds whose notes are simple and moderately delivered. He is, indeed, more remarkable for his indefatigable propensity than for his powers. Single sounds, from whatever source they may come, from birds, quadrupeds, reptiles, or machines, he gives very accurately; but I have heard numbers of Mocking-Birds in confinement attempt to imitate the Canary, and always without success. There is a common saying, that the Mocking-Bird will die of chagrin, if placed in a cage by the side of a caged Bobolink, mortified because he cannot give utterance to his rapid notes. If this were the cause of his death, he would also die when caged in a room with a Canary, a Goldfinch, or any of the rapidly singing Finches. It is also an error to say of his imitations, as the generality of writers assert, that they are improvements upon the originals. When he utters the notes of the Red-Bird, the Golden Robin, or the Common Robin, he does not improve them; and when he gives us the screaming of the Jay or the mewing of the Cat, he does not change them into music.
As an original songster, judging him by what he is capable of performing, however unfrequently he may exercise his powers to the best advantage, the Mocking-Bird is probably equalled only by two or three of our singing-birds. His notes are loud, varied, melodious, and of great compass. They may be compared to those of the Red Thrush, more rapidly delivered, and having more flute notes and fewer guttural notes and sudden transitions. He also sings on the wing and with fervor, like the Linnet, while the other Thrushes sing only from their perch. But his song has less variety than that of the Red Thrush, and falls short of it in as many respects as it surpasses it. For the greater part of the time, the only notes of the Mocking-Bird, when he is not engaged in mimicry, are a sort of melodious whistle, consisting of two notes about a fourth apart, uttered in quick, but not rapid, succession, and hardly to be distinguished from those of the Red-Bird of Virginia.