THE TAWNY THRUSH.
Turdus Wilsonii, Bonap.
PLATE CLXIV. Male.
The song of this northern species greatly resembles that of its relative, the ever-pleasing Wood-Thrush. While at Charleston, in March 1834, I heard a bird singing in the garden-ground of my learned and highly respected fellow-citizen Mr Poinsett, in the immediate neighbourhood of the city. I mentioned the circumstance to my friend John Bachman, who expressed his surprise on account of the early period of the season. The next day, as we were both going out to the woods, we heard the same music again, when a short discussion ensued, and as neither of us could be positive whether it came from a Wood-Thrush or not, we shot the bird, which we instantly discovered to be of the species which has been honoured with the name of its illustrious discoverer. This was the more extraordinary, as that Thrush is very rarely seen in Carolina either in winter or in summer. It was indeed the first time my friend Bachman had ever heard its voice.
Wilson's Thrush is never seen or heard in Louisiana during spring, and a few only pass through the lower portions of that State in autumn. I suppose its migration from the farther south is along the declivities of the range of the Alleghany Mountains, at least for some distance, and it probably takes place under night. It reaches the mountainous districts of Pennsylvania early in the month of May, but few if any breed there. In the upper parts of the State of New York, they become more plentiful, and there some undoubtedly spend the summer; but from Massachusetts eastward to Labrador, they become more and more abundant. On the 20th of July, while in the latter country, I saw the young of this species following their mother. They were there almost full grown, and could fly a hundred yards or so at a time. By the 12th of August none were seen, although during my stay they were as common as any other birds. In the latter part of the same month, I met with those which had bred at Newfoundland, on their return to the south, and followed them into Massachusetts.
At Labrador, as well as in the latter State, the Tawny Thrush retains its retired habits, and seeks refuge in the concealment of dark shady woods, near brooks or moist grounds. There, in a low bush, or on the ground beneath it, this bird builds its nest, which is large, composed externally of dry leaves, mosses, and the stalks of grasses, and lined with finer grasses, and delicate fibrous portions of different kinds of mosses, without any mud or clay. The eggs, which are deposited early in June, are from four to six, and resemble those of the Cat Bird in colour and shape, but are of smaller size. They raise only one brood in the season. The parents, ever extremely shy, shew no desire to assist their young, or defend their nest from intruders, but remain during your visit at some distance, uttering a mournful and angry quake, somewhat resembling that of the Cat Bird on such occasions. The Cow Bunting not unfrequently deposits its egg in the nest of this Thrush, where it is hatched, and the young brought up with all imaginable care. In the neighbourhood of the city of Boston, some of these birds, according to my learned friend Nuttall, breed sometimes in the gardens, and he has known of a nest placed in a gooseberry bush. A full-fledged young one that was caught and placed in a cage, retained the unsocial and silent timidity peculiar to the species. The males are obstinate in their quarrels, and fight with great fierceness in maintaining their right to the ground which they have appropriated to themselves.
The song of this species, although resembling that of the Wood Thrush in a great degree, is less powerful, and is composed of continued trills repeated with different variations, enunciated with great delicacy and mellowness, so as to be extremely pleasing to one listening to them in the dark solitudes where the sylvan songster resides. It now and then tunes its throat in the calm of evening, and is heard sometimes until after the day has closed.
It searches for food even at those hours, and feeds principally on coleopterous insects. In Labrador it also picks the tender blossoms of several dwarf plants, and feeds on berries. Its time is, for the most part, spent on the ground, where it moves with singular agility by leaps, stopping instantaneously and standing erect for a few moments, as if apprehending danger, but immediately renewing its course.
We have in the Middle Districts another species of Thrush nearly allied to this, but differing considerably in the size and shape of its bill, and especially in its habits. Of this bird I shall give you an account on another occasion.
The specimen represented in the plate was procured and drawn in the State of Maine, and was in full plumage. The female can scarcely be distinguished from the male.
Turdus Wilsonii, Ch. Bonaparte, Synops. of Birds of the United States, p. 76.