Nearly allied to the preceding species, the Merganser is fairly common round our shores in winter, and nests in considerable numbers in Scotland, both on lakes and tarns, as well as on the coasts in the north and west. In Ireland it is a very common resident, breeding especially abundantly on the west coast. In habits and food it resembles the Goosander, but is less frequently found inland and far more partial to the sea than that species. The nest is not placed in a hole but in thick cover at no great distance from water; the eggs, generally about ten in number, are of a pale greenish drab and are never of that creamy tint which distinguishes those of the former species. In these Ducks the male apparently helps the female in attending on the young and in catching the small fry on which they live. Although smaller, this species is not unlike the Goosander; the male may always be recognised by his reddish breast, streaked with black; the wing patch is white, barred with black, and on the breast at the point of the wing there is a conspicuous tuft of white feathers, with black margins; the long falcated inner scapulars are black. The female has a distinct black bar across the wing patch, but in other respects, except size, closely resembles the Duck Goosander. Length 24 in.; wing 9·5 in. THE SMEW Mergus albellus, Linnæus This species, the smallest and scarcest of the Sawbills, only comes to us in the winter, its breeding haunts being near the limit of tree growth throughout Northern Europe. It may be found on inland rivers and lakes, as well as in sheltered bays and estuaries on the coast. Immature examples with a red head, known as “Red-headed Smews,” far out-number the adults, and old males in full plumage are rarely seen. This is one of the species that occupies the boxes in Sweden and Lapland, and the discovery of its eggs, fifty years ago, was due to the energy and perseverance of an Englishman, John Wolley, who, after four years’ search, succeeded in obtaining three eggs together with a sitting bird. The eggs are cream coloured and not unlike those of the Wigeon, but they are slightly smaller. [Illustration: RED-BREASTED MERGANSER _Mergus serrator_] The adult male is entirely white, except for the mantle and quills, which are jet black. The rump, upper tail coverts, and tail are bluish grey, and the flanks delicately vermiculated with the same colour. Stretching half-way across the breast is a narrow black bar, and a shorter but broader one starts a little farther back. There is a black patch between the bill and the eye on each side, and another high up on the occiput joining its fellow on the opposite side, this black crescent being broken by the overlapping of the slightly elongated feathers of the head.