This note is uttered both while the bird is on the ground and in the air. In the pairing season it is run out into a trill. The movements of the Golden Plover during winter are largely regulated by the weather, and I have known it desert a district entirely, or become very restless and unsettled, just previous to a storm. In spring the sea coasts are deserted, and the Golden Plover retires to its breeding-grounds. These, in our islands, are situated on the upland moors and mountain plateaux. The nest, invariably made upon the ground, is often placed on a hassock of coarse herbage, or on a tuft of cotton grass, and consists merely of a hollow, lined with a few bits of withered grass or dead leaves. The eggs are four in number, buff blotched and spotted with various shades of brown, and more sparingly with gray. They are much richer and yellower in appearance than those of the Lapwing, otherwise closely resemble them. GRAY PLOVER. This handsome bird, generically separated by many ornithologists from the preceding, on account of its possessing a minute and entirely functionless hind toe, is the _Vanellus helveticus_ of Brisson, and the _Charadrius helveticus_ of writers who ignore the genus _Squatarola_, founded by Leach on the above-named trivial and, all things considered, utterly inadequate character. The Gray Plover is the first species we have considered in the present work that does not breed in the British Islands. Many birds of this species only pass our coast on migration in going to, and returning from, their Arctic breeding-grounds, but a fair number linger upon them throughout the winter. The Gray Plover may be readily distinguished from the preceding, as well as from all other allied forms, by the presence of a rudimentary hind toe, and by its _black_ axillaries. In its seasonal changes of plumage it closely resembles its ally. In the adult plumage, however, it never exhibits any of the yellow, drop-like, spots on the upper parts, so characteristic of that bird in every feather stage of its existence. Gray Plovers begin to arrive on the British coasts as early as August, and the migration continues with increasing strength until October or November. Such individuals as pass our islands for more southern haunts return along the British coasts during May and June. During its sojourn with us, the Gray Plover confines itself almost entirely to the mud-flats and salt marshes. It does not gather into such large companies as the Golden Plover—but this may be due, perhaps, to its smaller numbers—and is often seen in pairs or small parties, whilst odd birds will occasionally attach themselves to flocks of Knots and Dunlins. In its habits generally, in its flight, and in its food, it closely resembles its commoner and better known ally. The note uttered whilst the bird lives upon our coasts resembles that of the Golden Plover.