The COW or MEADOW WAGTAIL (Budytes flavus) is blueish grey upon the head and nape, the back is olive-green, and under side bright yellow, the quills and tail are of a blackish hue, with light borders; a pale stripe passes above the eyes, and two yellow lines across the wings; in the female and young all the colours are fainter and greyer than in the male bird. The eye of all is dark brown, the beak black, the base of the lower mandible light blue, and the foot black.
The Meadow Wagtail is generally found in the central and northern parts of Europe; it frequents meadows and the banks of small streams, and feeds principally upon flies and aquatic insects. The nest is built in holes in meadow ground, or at the foot of trees; the eggs are six in number, with light flesh-coloured blotches. Gould supposes these birds, although not visiting England, to be numerous on the Continent. He received one that he tells us was shot in the neighbourhood of Paris, and in May specimens were killed in Sweden by N. C. Strickland, Esq. From the account of this gentleman, their manners are very different from those of our Yellow Wagtail, as they run about with the tail elevated, and the wings hanging down and spread. We have also received the bird from the Himalaya Mountains. The first British specimen was shot near Colchester by Mr. Henry Doubleday, who was attracted by observing a pair of birds together, long after the time that our Common Yellow Wagtail leaves the country. In 1836 two were seen near Edinburgh, and others have since been seen at intervals in different parts of England.
RAY'S WAGTAIL.
RAY'S WAGTAIL (Motacilla or Budytes Rayi)—the Yellow Wagtail, formerly called Motacilla flava—so well known as a summer visitant to England, is very rare on the continent of Europe, where the preceding species, called by Continental authors Motacilla flava, is found. Mr. Gould was the first to point out the difference between the two, and to assign to the British species the name of Ray's Wagtail, in memory of the distinguished naturalist by whom it was first observed.
"In Ray's Wagtail," says Yarrell, "the line over the eyes and ear-covers is yellow, and the back of the head is, I believe, invariably the same as the back of the bird; while, in the Grey-headed Wagtail, or Continental species, the white elongated line over the eyes and ear-covers appears to be permanent, and the grey head is more or less conspicuous at all seasons, particularly in summer. The females of the two species most resemble each other.
The Yellow Wagtail (B. Rayi) comes to us from the south, appearing at the end of March or beginning of April, and leaving us in September. It frequents ploughed fields and uncultivated ground covered with furze; it makes its nest both in arable land and fields of wheat and tares, and does not appear so partial to water as other species. "It frequents," says Mr. Yarrell, "dry fallows and fields of young corn, where, perched upon a clod or stone, it exhibits its rich yellow breast to great advantage." The nest, which is placed upon the ground, is formed of dry stalks and fibres, and lined with hair. The eggs, from four to six in number, somewhat resemble those of the Sedge Warbler; they are of a whitish hue, mottled with various shades of brown. The young begin to fly about the end of May, and from that time till the season for migration, may be seen following their parents in search of food, keeping so close to the feet of cattle and sheep as to be in constant danger. A writer quoted by Mr. Yarrell says, "I have seen whole parties of Yellow Wagtails running and dodging close to the cows' heads, apparently catching small insects. I suppose the cattle disturbed the flies which are the favourite food of this bird, and lodge in the grass, and which, as they arose, were caught by the watchful Wagtail, before they could secure their retreat. The call-note of this bird resembles that of other species, although more shrill than that of the White Wagtail; it consists of two notes, repeated in succession, the second of which is one whole tone lower than the other."
THE VELVET-HEADED OR SHEEP WAGTAIL.
The VELVET-HEADED or SHEEP WAGTAIL (Budytes melanocephalus) is of a rich black upon the brow, top of the head, and region of the eye; the entire mantle is olive-colour, shaded with green; the under side is bright sulphur-yellow; the wings and centre tail-feathers are black, with light edges; and the wing-covers brownish black, bordered with white. The female is of an olive-green above and pale greyish yellow on the under side; the region of the ear is black. A remarkable variety inhabiting Great Britain is yellowish green on the top of the head and nape, but the rest of its plumage resembles that of the above-mentioned species. Both birds are from six to six and a half inches long, and from nine to ten broad; the wing measures from two inches and five-sixths to three inches and a quarter, and the tail two inches.
The Sheep Wagtails appear in Europe about May, and leave again in August or September. During the breeding season they usually frequent marshy districts, and the immediate vicinity of water, but at other times pass almost the entire day in pasture lands, near flocks of sheep or herds of cattle. Most members of this family breed in Greece and North Africa, but some few in the northern parts of Europe. The flight of all is light, and often remarkably rapid; they generally hover before alighting, or sink suddenly and directly earthward, with wings completely closed. Their song consists of a few insignificant piping notes. Although of a social temperament, they display during the breeding season a most quarrelsome and pugnacious disposition, pursuing and giving battle to every small bird that ventures to approach their dwelling-place. The nest is concealed among grass, corn, or water plants, and is usually made in a slight hollow in the ground; in form it resembles that of a Lark or Pipit; the walls are loosely constructed with fine roots, grass, dry leaves, and moss, and the interior lined with wool, horsehair, and feathers. The eggs, from four to six in number, have delicate shells, of a yellowish, reddish, or greyish hue, veined, spotted, and clouded with brown, yellow, violet, and grey. But one brood is produced in the year; the female alone undertakes the duty of incubation, and hatches the nestlings in about three days. Both parents exhibit the utmost anxiety about the safety of their little ones, and frequently betray their retreat by the cries of alarm which they utter on the approach of a stranger. Young and old remain together until they start forth on their winter excursions.
Jerdon is of opinion that from the description of B. melanocephalus of Southern Europe, there is little doubt that it is identical with the Indian bird, which thus appears also to inhabit Northern Africa, South-eastern Europe, and Western Africa. "In India this Wagtail comes in towards the end of September, and does not quit the north of India, till the end of April or beginning of May. It is exceedingly abundant in every part of India, usually assembling in considerable flocks and feeding among cattle, picking up the insects disturbed by their feet while grazing. These birds also frequent damp meadow ground near rivers or tanks, grain fields, where they may be often put up with the so-called Ortolan (Calandrella brachydactyla) during the heat of the day, and, late in the season, they may always be seen taking advantage of any shade—a tree, stone, small clump or paling, to shelter them from the mid-day heat. Now and then a few may be seen about houses in gardens and roads, occasionally even perching on a housetop or paling, but very rarely on trees. Many are snared at Calcutta and elsewhere to be served up as Ortolan."