The season of the year at which the incubation of these birds takes place is somewhat uncertain, and naturalists differ very considerably in their opinions on this point. According to our own observations and experience, they breed but once in the year. The nest, like that of the Pirol, is suspended between two branches at some distance from the ground, and so placed as to be fully exposed to all the changes of wind and weather; nevertheless, the exterior is very carelessly formed of twigs and fibres, and has no lining except at most a few coarse hairs. The eggs, three or four in number, have a white or reddish white shell, spotted with brown or red. Many species of the Drongo are caught and reared; the Bee-eater in particular is very commonly seen in the houses in Calcutta and other Indian cities. Blyth tells us that it is readily tamed, and soon becomes a most amusing companion, from the power it possesses of imitating not only the voices of other birds, which it does so exactly as to deceive their mates, but also any sound it hears.
The SWALLOW SHRIKES (Artami) constitute a family of strangely-formed birds, that inhabit New Holland, India, and the Malay Islands. Their muscular bodies are furnished with very long wings, in which the second quill is longer than the rest. Their short or moderate-sized tails are either quite straight or slightly incised at the extremity. The beak is short, almost conical, rounded at the sides, the upper mandible slightly bent at the tip, and incised at the margins. The feet are strong, with short tarsi and toes, the latter armed with sharp and very hooked claws. The plumage is thick, and of a dusky hue.
THE WOOD SWALLOW SHRIKE.
The WOOD SWALLOW SHRIKE (Artamus sordidus) is of a reddish grey upon the body; the tail and wings are dark blueish black, the third and fourth quill being edged with white upon the outer web. The tail-feathers, with the exception of the two in the centre, are broadly tipped with white. The eye is dark brown, the beak blue at its base and black at its tip; the feet are greyish white. The female is smaller than her mate, and presents a spotted appearance upon the back, the feathers on that part having a dirty white streak upon their shafts. The colour of the surface of the body is a mixture of white and brown. This bird is about six inches long and thirteen and a half broad.
The various species of Swallow Shrike, though differing slightly in some of their habits and in their mode of life, still bear so strong a family likeness to each other as will permit us to describe them collectively. All prefer woodland districts, and usually select localities in which their favourite trees abound. One species in particular is called by the natives the Palmyra Swallow, from the fact that it always seeks the shelter of the Palmyra palm. Such members of the family as inhabit Java select trees growing in open tracts, covered with short grass and brushwood; one of their favourite trees is then chosen as a sleeping-place or gathering-point, and from thence they fly over the surrounding country in search of food. Jerdon tells us that the fancy of the Swallow Shrike for certain trees is so strong that where these grow it is often found living at an altitude of 4,000 feet above the level of the sea. It is only in the air that these birds exhibit their full powers; and as they glide along, with outspread but almost motionless wings, their movements resemble those of some of the Raptores. Other species, on the contrary, exhibit all the rapidity and free evolution of the True Swallow, as they soar aloft or sink rapidly to the earth in pursuit of their tiny aërial victims. They but rarely descend to the ground, as their progress on foot is accomplished with some difficulty. Shortly after the breeding season enormous parties of Swallow Shrikes congregate upon the trees, where they live in the utmost harmony, each one satisfying its own wants, and carrying on the business of the day without either molesting or rendering assistance to its companions. A tree thus occupied is as full of life and bustle as a beehive, every part of its foliage affording a perch to one of these hungry and active birds, whose sharp eyes enable them instantly to detect and dart upon a passing insect, after which process they at once return to their former position on the tree. Gould tells us that these large flocks may often be seen hovering over a sheet of water, and literally darkening its surface by their numbers, as they dart about amidst the tempting hosts of insects that abound in such localities. We must not omit to mention one very striking peculiarity of the Wood Swallows. Gilbert tells us he has seen swarms of these birds, as large as a bushel measure, hanging like bees in large clusters from the branches of the trees. "This bird," says Gould, "besides being the commonest species of the genus, is a great favourite with the Australians, not only on account of its singular and pleasing actions, but by its often taking up its abode and incubating near the houses, particularly such as are surrounded by paddocks and open pasture-land, skirted by large trees. It was in such situations as these I first had the opportunity of observing this species; it is there very numerous in all the cleared estates on the south side of the Derwent, about eight or ten being seen on a single tree, crowding against one another on the same dead branch, but never in such numbers as to deserve the appellation of flocks. Each bird appeared to act independently of the other, each, as the desire for food prompted it, sallying forth from the branch to capture a passing insect, or to soar around the tree and return again to the same spot. On alighting it repeatedly throws one wing out at a time, and spreads its tail obliquely, previous to settling. At other times a few were seen perched on the fence surrounding the paddock, on which they frequently descended like Starlings, in search of coleoptera and other insects. It is not, however, in this state of comparative quiescence that this graceful bird is seen to best advantage, neither is it at that state of existence for which its form is especially adapted; for though its structure is more equally suited for terrestrial, arboreal, and aërial habits than any other species I have examined, yet the form of the wings point out the air as its peculiar province. Here it is that when engaged in pursuit of the insects which the warm weather has enticed from their lurking-places among the foliage to sport in higher regions, this beautiful species in its aërial flights displays its greatest beauty, whilst soaring above in a variety of easy positions, with its white-tipped tail outspread."
The voice of these birds resembles the call-note of the Swallow, but is somewhat harsher and more monotonous. Some are stationary, while others wander from one place to another as soon as the period of incubation is over. The Wood Swallow makes its appearance in Van Dieman's Land in October, at the commencement of the Australian summer; and after rearing two broods returns again to more northern latitudes. The nests are built in a great variety of situations. Gould found one in a thickly-foliaged bush close to the ground, another placed in the fork of a bare branch, and others under the loose bark of a large tree; they are also frequently placed under the roofs of the settlers' houses; and one species in particular prefers to avoid all labour by taking possession of the deserted nests of other birds. Their own nests are usually neatly formed of delicate twigs, woven together, and lined with fine fibrous roots. The four eggs that constitute a brood are generally of a dirty white, spotted and streaked with reddish brown. Bernstein tells us that the species inhabiting Java build amid the parasitic plants that cover their favourite palms, or upon the leaves of the tree itself, forming their little abodes of grass, moss, fibres, and small leaves, carelessly arranged, but strongly lined with soft and elastic materials. The Indian species, according to Jerdon, makes a bed of feathers inside its nest. Many of the members of this family remain in company even during the breeding season, and build in close proximity to each other. It is still uncertain whether the male bird assists in the cares of incubation, but both parents tend their young with great care, and rear them exclusively upon insect diet.
The FLY-CATCHERS, according to Linnæus, comprise a large number of small singing birds, distinguished by their broad, flat beaks. These have again been divided into a variety of families, amongst which the following stands first upon our list as forming a connecting link between the Fly-catchers and the Shrikes properly so-called.