Summer—head and back bluish grey; a pale streak above the eyes; throat black; under parts bright yellow; tail very long. Winter—chin and throat whitish, passing into yellow. Length seven inches and three-quarters. Eggs bluish white, speckled with dark grey.
Grey Wagtail is not a very happy name for this bird, as the bright yellow of its neck and breast are far more conspicuous than the more sober grey of the head and back; yet, as there are other claimants for the more appropriate names 'Yellow', and Grey-headed, the young observer must be cautious while reading the descriptions of the several members of the family, or he may possibly fall into error. The Grey Wagtail is among the most elegant and graceful of British birds, and in delicacy of colouring is surpassed by few. Its habits are much the same as those of the Pied Wagtail, but it is even lighter and more active in its movements. It is less frequently observed away from water than that species, and though, like it, not altogether a permanent resident in England, it visits us at the opposite season, coming in autumn, and retiring northwards in spring. It does not seem often to go so far north as Inverness-shire, but is regularly seen about Edinburgh in winter; and, on the other hand, it breeds yearly in the southern counties of England during summer, as on the streams which flow from Dartmoor. This partial migration seems to be characteristic of the family, and is difficult to account for. Why out of a certain number of birds of the same species, some should annually travel southwards, to supply the place of individuals belonging to an allied species, who have travelled yet further to the south, and why, on the reappearance of the latter in spring, the first should return to their northern haunts, are questions more easily asked than answered.
The Grey Wagtail has been repeatedly observed to indulge in a fancy which might well obtain for it the name of 'window-bird'. The first recorded instance occurs in an early number of the Zoologist, where it is stated, that every morning for a period of between three and four months, from the beginning of October to the end of January, a Grey Wagtail came to the window of a country house as soon as the blinds were drawn up, and darted against the panes of glass, pecking with its beak as if it saw some object. It would then retire, and after a pause repeat the operation, but from what motive no one could conjecture. A lady writes to me from Dewlish House, Dorsetshire: 'We are constantly being disturbed by a yellow-breasted Water-Wagtail, which comes tapping at the windows or skylights, from the first streak of light till evening. What may be his object no one can say. It is too cold at present (March) for flies or spiders, and, had there been any hybernating there he would have eaten them long ago, he comes so frequently. When, on going upstairs, or when sitting down in my room, I hear this loud repeated tapping, it is vain for me to open the window and try to entice him in with crumbs; he does not even notice them. This morning he woke me at about four o'clock. You would have said, 'Some one rapping at my window as a signal that I must get up. An old servant tells me, "Ah, 'twere just the same last spring, when the family were in London; they say that it do mean something."'
The Grey Wagtail does not commonly build its nest in the southern counties of England, although instances have occurred. It prefers hilly and rocky districts. More frequently it repairs in spring to the north of England and south of Scotland, and builds its nest on the ground, or in the hole of a bank, or between large stones, and never at any great distance from the water. It is composed of stems and blades of grass, mixed with moss and wool, and lined with wool, hair and feathers.
THE BLUE-HEADED (OR GREY-HEADED) WAGTAIL
MOTACILLA FLAVA
Top of the head, lore, and nape lead-grey; over the eye a white streak; scapulars, back, and upper tail-coverts greenish olive, tinged with yellow; chin white, in the young male yellow; under parts bright yellow. Length six inches and a half. Eggs mottled with yellow, brown, and grey.
This, one of the common Yellow Wagtails of the Continent, is a rare visitor in this country. Its habits, nest, and eggs, closely resemble those of the next species. It is the Bergeronette printanière ('Little shepherdess of the Spring') of the French, a pretty name, suggested by the habit, common to all the genus, of resorting to sheepfolds for the sake of feeding on the flies with which such places abound.
YELLOW WAGTAIL
MOTACILLA RAII
Top of the head, lore, nape, back, and scapulars pale olive; over the eye a streak of bright yellow; chin yellow; lower parts of the same colour. Length six inches and a half. Eggs whitish, mottled with yellow, brown, and grey.
Ray's Wagtail, the third of the Yellow Wagtails placed on the list of British birds, is, next to the Pied, the best known species, being a regular summer visitor, and everywhere tolerably common. It is said by most authors to frequent the water rather less than the other species, and to prefer fields of peas and tares, open downs and sheep pastures; but, as far as my own observation goes, I have seen it far more frequently near water than elsewhere, and if I wished to observe its habits, I should repair to the nearest canal or river, in the certain expectation of seeing a pair hunting among the aquatic weeds for their food, running along the sandy or muddy shore, perching on the broad leaves of the water-lily, and chasing each other with dipping flight through the air. I am inclined to believe that, though it may have often been noticed in dry pastures and stony places, yet that when so circumstanced, it is only engaged on an exploring expedition from its watery haunts; for it is scarcely possible that a bird so thoroughly at home in a weedy pond, can ever be long absent from such a locality from choice. Its habits are precisely similar to those of the Pied Wagtail, except that it visits us in the summer exclusively, retiring southwards in autumn. It may often also be seen in company with that species. Besides its call-note, which consists of two shrill notes, the second of which is a musical tone lower than the first, it has a short and exceedingly sweet song, something like that of the Redbreast when at its best. This I have heard it utter whilst it was perched on a low bush overhanging a pond. Its nest was probably somewhere in the neighbourhood, for when disturbed it flew to a short distance only, alighted on another twig and repeated its warble again. This was in the first week in May, and is the only occasion on which I ever heard it really sing. The nest resembles that of the Pied Wagtail, and is placed on the ground, usually in pea-fields. The popular name Washerwoman belongs to the whole family. The corresponding term, Lavandière, is also found in France, and was given from the fanciful similarity between the beating of the water with its tail by the bird while tripping along the leaves of a water-lily, and the beating of linen in the water by washerwomen, a custom still existing in France, and some parts of England and Ireland.