sound,’ Yarrell truly says, ‘can be easily imitated by vibrating the tongue against the roof of the mouth; but the imitation, excellent as it may be close to the performer, is greatly inferior in power, being almost inaudible to anyone twenty yards off, while the original can be heard in calm weather for half a mile or more.’ Of the other curious vocal performance of the nightjar the same author says: ‘On the wing, while toying with his mate, or executing his rapid evolutions round the trees, ... the cock occasionally produces another sound, which, by some excellent observers, has been called a squeak, but to the writer is exactly like that which can be made by swinging a whipthong in the air.’ Most of the names the bird is called by have reference to its summer song--spinner, wheelbird, night-churn, and churn-owl. The nightjar deposits its two eggs on the bare ground; their colour is white or cream, blotched, mottled, clouded, and veined with brown, blackish brown, and grey. One brood is reared in the season. The return migration is in September. * * * * * A single specimen of the red-necked nightjar (_Caprimulgus ruficollis_), an inhabitant of South-western Europe, has been obtained in this country; and (in 1883) one specimen of the Egyptian nightjar (_Caprimulgus ægyptius_), was shot in Nottinghamshire. Spotted Woodpecker. (Great Spotted Woodpecker.) Dendrocopus major. Crown and upper parts black; a crimson patch on the back of the head; a white spot on each side of the neck; scapulars, lesser wing-coverts, and under parts white; belly and under tail-coverts crimson. _Female_: without crimson on the head. Length, nine and a half inches. * * * * * The present species is less common than the green woodpecker; and as it seldom goes to the ground, and usually confines its food-seeking to the higher branches of trees, it is rarely seen. Nor is it nearly so loquacious as the larger bird, nor so richly coloured, although handsome and conspicuous in its black-and-white dress, with a touch of glossy crimson on the nape. It frequents woods, hedgerows, and plantations, also pollard willows growing by the side of streams. It may be met with in most English counties, but in the northern counties and in Scotland it is very scarce. In Ireland it does not breed, although occasionally seen there as a migrant in winter. These migrants come from northern Europe, sometimes in considerable numbers, and are diffused over the British Islands; the birds of British race are believed to remain in this country throughout the year. [Illustration: FIG. 60.--SPOTTED WOODPECKER. ⅕ natural size.]