The WHITE-WINGED TERN (_Hydrochelidon leucoptera_) has the body-feathers of a rich deep black; the upper part of the wing is blueish grey; the shoulders and points of the secondary quills are whitish grey, and the rump and tail-feathers white. This species, which closely resembles the Black Tern in size, manners, and habits, is very rare upon the coasts of Great Britain. Temminck states that it frequents the shores of the Mediterranean, and the lakes, rivers, and marshes beyond the Alps, being common about Gibraltar, and Lakes Como, Lugano, and Lucerne, but that it never visits Holland, or North Europe. Nilsson, on the contrary, includes it amongst the birds of Germany and Scandinavia. The food of the White-winged Tern consists of winged and aquatic insects, worms, and sometimes small fishes. THE WHITE-BEARDED TERN. The WHITE-BEARDED TERN (_Hydrochelidon leucopareja_) has the black upon the head and nape divided from the dark grey lower neck by a broad white stripe; the breast is dark grey, mantle light grey, and belly greyish white. This rare bird was first discovered by M. Natterer, in the marshes of South Hungary, and is but very seldom seen in Great Britain. We are little acquainted with its habits beyond that it subsists upon worms, snails, and winged insects. Yarrell describes the egg as being one inch and a half long, by one and one-eighth broad, with an asparagus-green shell, spotted with brownish black and blueish grey. THE WHITE OR SILKY TERN. The WHITE or SILKY TERN (_Gygis Candida_) is a beautiful bird, with slender body, long thin beak, which curves perceptibly upwards, long wings, and deeply excised tail. The feet are small, and the toes furnished with a narrow web; the plumage is of silky softness and pure white; the eye is black, the beak dark blue towards its base and black at the point; the foot is saffron-yellow.