The Kestrel (Tinnunculus cenchris) is a species very similar to the bird above described, and likewise inhabits the southern countries of Europe. The male is twelve inches long and twenty-six inches broad; the wing measures ten inches and the tail five and a half. The body of the female is somewhat larger than that of her mate, being thirteen inches long, and twenty-eight across the span of the wings. The plumage of the male bird is of a blueish grey upon the head, large wing-covers, posterior quills, and tail; the back is brick red, the feathers upon the breast yellowish red, marked with very small, often scarcely perceptible, spots; the tail is tipped with black. The eyes are dark brown, the beak light brown, and the feet lemon colour; the claws are yellowish white. The female closely resembles the female Lark Kestrel in appearance, but is paler in colour, and, moreover, recognisable by its whitish-blue tail and white claws. The young are like the mother.
THE RED-FOOTED OR EVENING FALCON (Erythropus vespertinus).
Spain and the neighbouring islands, Malta, South Italy, and particularly Greece, together with some of the countries lying still farther east, form the habitat of these birds; they are also very common upon some of the Russian steppes, but are rarely met with in mountainous districts. Such lowland regions as are in the immediate neighbourhood of water afford them the retreats they prefer, as there they find that unfailing supply of insect nourishment upon which they almost entirely rely. This species appears in Greece at the end of March, and migrates about the end of September. The eggs are usually laid at the bottom of some old wall or in the roofs of houses, whether the latter are inhabited or not. The brood consists of from four to six eggs, closely resembling those of the species last mentioned, but rather smaller (see Coloured Plate IV., Fig. 19). During the period of incubation the parents are often so intent on their duties that they will allow themselves to be captured by hand. The flight of the Kestrels is light and rapid, but far inferior to that of the True Falcon; occasionally they will soar high into the air, but usually fly at no great distance from the earth; when about to seize their prey, they hover before descending, performing the latter movement with considerable celerity. Whilst perching, the plumage is allowed to droop carelessly, and thus gives the bird the appearance of being larger than is actually the case. Upon the ground they have the advantage over the True Falcons, as the greater length of the tarsi renders their movements light and easy.
As regards the perfection of their senses they are by no means behind their more powerful kindred, though they differ from the latter considerably in disposition, being extremely lively and bold. Above all things they seem to delight in tormenting birds much larger than themselves; they pursue the most formidable amongst the many tyrants of the air without the slightest fear, and persecute and annoy the Screech Owl incessantly; they will often confront even man himself with great spirit and determination, and in some countries live upon the most friendly terms with the inhabitants of the houses in the thatch of which they lay their eggs. Their cry is a clear cheerful note, which varies in its sound according to the feeling it is intended to express. When caged they may be rendered extremely tame, so that they may be permitted to fly in and out, and will come at their master's call.
The Kestrels usually leave their sleeping-places very early in the morning, and continue to sweep over the face of the country long after the shades of evening have closed in. When about to migrate they assemble in large flocks, which remain associated until they return in the spring. Jerdon tells us that both species are regular visitors to Southern Asia, and we ourselves have seen great swarms of them in Central Africa during the months that form our cold season. Districts abounding in locusts are generally preferred as winter quarters, such localities affording an inexhaustible supply of food; indeed, those who have never seen an army of locusts can form no adequate idea of the immense numbers in which they are often met with; whole tracts of woodland are completely covered by them, and their hosts darken the air whenever they are roused from their work of devastation. To the Kestrels these swarms furnish a rich field for exertion and active enjoyment; perched upon the highest branches of the mimosa, they await the moment when the locusts take wing, and then dart upon their prey; in vain the insect endeavours to free itself by biting the enemy's foot; the powerful antagonist makes short work of its struggles by crushing the head; the wings and feet are then torn off, and devoured while the bird hovers in the air. We have often amused ourselves by shaking the trees or bushes, and thus rousing the locusts, in order to enjoy the pleasure of seeing the dexterity displayed by the Kestrels during these onslaughts; for, strange to say, the insects appeared fully to understand their danger, and used all possible means to avoid their evidently dreaded enemies.
THE RED-FOOTED OR EVENING FALCON.
The Red-footed or Evening Falcon (Erythropus vespertinus), one of the most beautiful members of this group, inhabits Southern Europe. It is distinguished from the Kestrels by the comparative shortness of its beak and tail, and by the great variety observable in the plumage, which differs not only with the sex but according to the age of the bird. The male of this species is about twelve inches long and thirty inches broad; the tail measures about five inches. The female is one inch and a half longer and two inches broader than her mate. When the male is in its full beauty the middle of the belly, hose, and under tail-covers are of a bright rust red, the rest of the plumage being of an uniform slate colour, the tail somewhat darker in hue than the other feathers. The cere, the bare place round the eyes, and the feet are brick red; the beak is yellow at its base and greyish blue towards the tip. The head and nape of the female are light rust red, the rest of the body blueish grey, striped with a darker shade upon the mantle and tail; the beard is brown, but with this exception, the front of the throat and sides of the neck are entirely white; the lower parts of the body are reddish, some of the shafts of the feathers being streaked with brown; the cere, eye-rings, and feet are orange. In the young birds the upper part of the body is dark brown, having every feather bordered with reddish yellow; the tail is of the latter colour, and marked with eleven or twelve dark streaks; the belly is reddish white, and the bare spots are lighter than in the female; the pupil of the eye is invariably brown.
The Red-footed Falcon inhabits the South-eastern parts of Europe and Central Asia, and is but rarely seen in the western countries of our continent; the extensive steppes of Hungary, Russia, and Asia must be regarded as its actual habitat, and from these tracts it migrates about August or September to India (it seldom visits either Egypt or Africa), and returns to Europe early in the spring. So closely does this species resemble the Kestrel in its movements, that when seen flying or perching it is extremely difficult to distinguish the one from the other, and the sound of their voices is almost identical; but when upon the ground the Red-footed Falcon is more active than the Kestrel; it lives almost entirely upon insects, and devours enormous numbers of grasshoppers, butterflies, beetles, and dragon-flies, usually capturing its prey when upon the wing. The eggs, four or five in number, are laid about May; they are small and round, with a very thin, yellow shell, marked with various spots of dark and light reddish brown. It is no uncommon circumstance for a pair of these Falcons to seize upon a Magpie's nest; and as the owner is generally not inclined to resign possession quietly, but calls loudly to its companions for assistance, long and severe are the battles that ensue. The young leave the nest about April, and are carefully trained in the art of obtaining prey by their parents until such time as the flock migrates. These birds are easily tamed, and cannot fail to attract attention by their beauty and the affection with which they regard those who show them kindness.