The goosander has a habit very singular in a bird of its conformation and marine habits during the greater part of the year: it breeds in the hollow trunk of a tree. Seebohm relates that the Finns take advantage of this habit, and of the goosander’s readiness to make use of an artificial substitute for the hollow trunk, by fastening hollow boxes, with a trapdoor behind, to the, trees. The peasant robs the nest daily until a score or more eggs have been taken; the bird is then allowed to keep and hatch any more that may be laid, so that the following year’s harvest may not be spoilt. He adds that if there is no hollow tree, and no boxes are provided, the nest is made in a hole under a rock, and that the bird has been known to breed in an old nest of a crow or bird of prey in a tree. When the nest is at a distance from the ground the parent bird removes her young in her beak, carrying them down one by one, then leading them to the water. The nest is made of weeds and moss, and a quantity of down from the bird is added. Eight to twelve eggs are laid, smooth-shelled, and creamy white in colour.
The call of the goosander is a low whistling cry.
Red-breasted Merganser.
Mergus serrator.
Bill and irides red; head, including crest and upper neck, dark glossy green; below, a white collar, divided on the nape by a narrow black line running to the back, which is also black; the long falcated inner scapulars black, the outer ones white; speculum white barred with black; rump, flanks, and tail-coverts vermiculated with grey; lower neck pale chestnut streaked with black, on each side a conspicuous tuft of white feathers edged with black; under parts white; legs and feet reddish orange. Length, twenty-four inches. The female has the head and neck reddish brown, and is less richly coloured than the male, and much smaller.
Fig. 87.—Red-Breasted Merganser. ¹⁄₁₁ natural size.
The present species exceeds the goosander in elegance of form and in handsomeness of colouring and ornament. It is a winter visitor, and also a resident throughout the year on the coast of Scotland north of the Clyde, and of the Orkneys, Shetlands, Hebrides, and St. Kilda. In Scotland and Ireland it inhabits inland lakes and rivers, as well as the sea-coasts. During the cold season it is gregarious, and usually goes in small flocks. In March these companies break up, and male and female are thereafter seen always in close companionship. They are excessively shy and wary birds, diving or taking to flight on the least alarm. They feed on small fishes and marine molluscs, which they take by diving; near the shore, where the water is shallow, they are often seen with head and neck almost continuously immersed as they explore among the seaweed at the bottom for food. They swim like the cormorant, having the faculty of sinking the body beneath the surface; and also dive like that bird, springing up and plunging down almost vertically. The favourite nesting-place is on an island, under the shelter of a rock, sometimes in a hole in the ground. The nest is formed of leaves and grass placed in a slight hollow, down being added later by the incubating bird. Six to nine eggs are laid, sometimes as many as twelve. The eggs are glossy, and pale olive-grey in colour. The drake does not assist in incubation or in protecting the young.
Smew.
Mergus albellus.
Forehead, crown, with crest, throat, neck, and under parts satin-white; a black patch before and below the eye, and a greenish black triangular patch on the crest; back black, with a crescentic mottled band of the same colour stretching over each side of the shoulders, and another in front of each wing; scapulars white margined with black; lesser wing-coverts white; greater coverts black, with two narrow white bars; wing- and tail-feathers blackish brown; flanks vermiculated with grey; bill, legs, and feet lead-colour. Length, seventeen inches. Female: head reddish brown; collar ash-grey; rest of the plumage much as in the male. In June the male assumes the female plumage, which is retained until the autumn.