The short-eared and Scop's owls are migratory species; both pass and repass the Mediterranean in great numbers every spring and autumn, not in flocks, but singly; the latter is much in request as an article of food, and killed in several of the islands in large numbers; during its passage through Malta dozens of this handsome little owl may be seen in the poultry market. As beetles, moths, and the larger insects constitute the favorite food of the Scop's owl, and bats enter largely into the fare of its short-eared congener, it may be supposed neither can have much inducement to prolong its stay in Europe after September.
The night-jar, although late in arriving in the north of Europe, crosses the Mediterranean in March; the nocturnal habits of the bird, by restricting its movements to night and twilight, will account for its slow progress; it is also much esteemed by the natives { 62} of the south as an article of food. None of the swallow tribe are more exact in their times of arrival and departure than the swifts, which seem to proceed further southward than any of the others; whether from sudden failure of food or change of climate, or both, it is seldom the black swift tarries on its way; for, not content with the climate of the southern shores of the great inland sea, it pushes on with little delay to Abyssinia, Nubia, and even Timbuctoo. The Alpine swift passes to and from Europe in small numbers; compared with the last-named species, this is a hardy bird; we have seen it and the house marten sporting around Alpine glaciers at the latter end of August, when there was a hoar frost every night, and occasional heavy falls of snow; many Alpine swifts spend the entire year on the Himalayan ranges. The chimney, house, and sand swallows make their first appearance in spring, and leave Europe in the order here given; none seem to pass the winter in any of the islands, and on their arrival in Africa move steadily southward to more genial regions. The rock swallow and rufous swallow make regular migrations from Asia Minor to south-eastern Europe, few venturing westward of Greece. Owing to the strong N.E. winds that prevail during the cold months, and sweep along the Mediterranean basin with great violence, many birds are blown from one coast to another, and turn up in districts in every way uncongenial to their habits and wants: thus are recorded by C. A. Wright, Esq., in his admirable catalogue of "Birds observed in Malta," the appearance of the diminutive golden and fire-crested wrens among the woodless tracts of these bare islands; supposing them to have come from the nearest point of Sicily, they must have flown at least fifty miles! Along the shores of the Mediterranean the approach of spring is heralded by flocks of gaudy bee-eaters, which may be seen advancing northward in scattered hosts emitting their characteristic call-note. We have watched them approaching Malta during the calm and delightful weather at that season, when a few, attracted by the verdure, would break off from the rest and descend, whilst the majority continued steering their course in a northerly direction. Luckless is the bird wanderer that makes a temporary resting-place of Malta at any time, especially on Sunday, for no sooner is an individual recognized than a dozen guns are put in requisition, and soon the fair forms of the bee-eater, oriole, etc., are seen stretched in rows on the benches of the poulterer. The weird-like form of the hoopoe may constantly be seen drifting before a south wind in spring, or hastening southward in August, seldom in flocks, but so numerous that on one occasion, on a projecting rock in the island of Gozo, we saw in the course of half an hour no less than ten hoopoes arrive, one after another. None of the woodpeckers, neither the creeper, nuthatch, nor the wren, seem to migrate. The warblers no doubt constitute by far the greatest minority of the birds of passage, and may be said to be most punctual in their time of arrival and departure. As with other groups, many entirely abandon their summer or winter residences at the migratory seasons, whilst others leave a few stragglers behind. The sedge, willow, garden, the chiffchaff, whitethroat, Sardinian, Dartford, subalpine, Vieillot's warblers, and the blackcap annually cross and recross the Mediterranean with undeviating regularity, some in enormous numbers, especially the garden warbler and whitethroat, which being then plump and in good condition are in great request, and constitute the Italian's much relished _beccafico_. The nightingale appears in considerable numbers and shares the same fate with the last-named species.