Birds build their nests in the most artificial manner, and line them as soft as possible, that the eggs or young may not be injured. Nor do they build promiscuously, but chuse such places as are most concealed, and likely to be free from the attacks of their enemies: thus the hanging-bird of the tropical countries, makes its nest of the fibres of withered plants lined with down, and fixes it at the extremity of some bough hanging over the water, that it may be out of reach; and the diver places its swimming nest upon the water itself, among the rushes.

The male rooks and crows, during the time of incubation, bring food to the females. Pigeons, and most of the small birds which pair, sit by turns; but where polygamy prevails, the males scarcely take any care of the young.

Birds of the duck kind pluck the feathers off their breast, and cover their eggs with them, lest they should be injured by cold when they quit their nest for food; and when the young are hatched, they shew the utmost solicitude in providing for them, till they are able to fly, and shift for themselves.

Young pigeons are fed with hard seeds, which the parents first have prepared in their own crops, that so the infant bird may digest them easily. And the eagle makes its nest on the highest precipices of mountains, and in the warmest spot, facing the sun; here the prey which it brings is corrupted by the heat, and made digestible to the young.

There is, indeed, an exception to this fostering care of animals in the cuckoo, which lays its eggs in the nest of some small bird, generally the wagtail, yellow-hammer, or white-throat, and leaves both the incubation and preservation of the young to them. But naturalists inform us that this apparent want of instinct in the cuckoo proceeds from the structure and situation of its stomach, which disqualifies it for incubation; still its care is conspicuous in providing a proper, though a foreign situation, for its eggs.

Amphibious animals, fishes, and insects, which cannot come under the care of their parents, yet owe this to them, that they are deposited in places where they easily find proper nourishment.

When animals come to that maturity as no longer to want parental care, they exercise the utmost labour and industry for the preservation of their own lives. But the different species are many, and the individuals of each species are very numerous. In order, therefore, that all may be supported, the Creator has assigned to each class its proper food, and set bounds and limits to their appetites. Some live on particular species of plants, which are produced only in particular animalcula; others on carcases, and some even on mud and dung. For this reason, Providence has ordained that some should swim in certain regions of the watery element; that others should fly; and that some should inhabit the torrid, the frigid, or the temperate zones. Different animals also are confined to certain spots in the same zone: some frequent the deserts, others the meadows, or the cultivated grounds; thus the mountains, the woods, the pools, the gardens, have their proper inhabitants. By this means there is no terrestrial tract, no sea, no river, no country, but what teems with life. Hence one species of animals does not injuriously invade the aliment of another; and hence the world at all times affords support to so many, and such various inhabitants, and nothing which it produces is in vain.

We ought to remark, also, the wisdom and goodness of Providence in forming the structure of the bodies of animals for their peculiar manner of life, and in giving them clothing which is suitable both to the country and element in which they live.

Thus the elephant, the rhinoceros, and the various kinds of monkeys, are destined to live in the torrid regions, where the sun darts its fiercest rays; their skins are therefore naked, for were they covered with hair, they would perish with heat. They are also of such conformation of body as to suit their different manner of life. The rein-deer has his habitation in the coldest parts of Lapland; his food is the liverwort, which grows nowhere else so abundantly; and as the cold is in that country intense, this useful animal is covered with hair of the densest kind; by this means he easily defies the keenness of the arctic regions. The rough-legged partridge passes its life in the Lapland Alps, where it feeds on the seeds of the dwarf birch: while, to withstand the cold, and to enable it to run freely among the snow, even its feet are thickly beset with feathers.

The camel is a native of the arid sandy deserts, which, with their dreadful sterility, are yet capable of yielding him support. How wisely has the Creator formed him! his foot is made to traverse the burning sands; and as the place of his habitation affords but little water, he is made capable of enduring long journeys, and going many days without quenching his thirst; for he is furnished with a natural reservoir, in which, when he drinks, he stores up a quantity of water, and has the power of using it in a frugal and sparing manner, when, for his food, he crops the dry thistle of the desert. The bullock delights in low rich grounds, because there he finds the food which is most palatable to him. The wild horse chiefly resorts to woods, and feeds upon leafy plants. Sheep prefer hills of moderate elevation, where they find a short sweet grass, of which they are very fond. Goats climb up the precipices of mountains, that they may brouse on the tender shrubs; and, in order to fit them for their situation, their feet are made for jumping.