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 eggs, and both labour with equal zeal in the feeding and rearing of the young. The eggs are laid towards the end of May, and towards the end of June young birds may be found in the nests; but the exact period of incubation is not as yet accurately determined. Should the lake on which the nest is placed be well stocked with fish, both the parents remain constantly with their progeny; but if there is a scarcity of such a supply, and the old birds have to resort to the sea for food, they do so by turns, each of them most probably bringing to the nest a share of what they capture wherewith to feed their nestlings. These last, however, as soon as they are hatched begin to show considerable aptitude for the chase, and are able to procure food for themselves betimes. When they are fully fledged they betake themselves to the sea.

THE GREAT NORTHERN DIVER.

The (Colymbus glacialis) is a very striking bird, measuring about three feet in length and five feet across the wings. The length of each wing is sixteen inches and tail two inches and a quarter. In its summer plumage it is principally black, enlivened with white spots; on the head and neck the feathers are greenish black, the latter being traversed by a broad longitudinal band of black and white; a similar stripe is situated on the fore part of the neck. The sides of the upper breast are black striped with white; the rest of the under surface is a rich satiny white. The eye is light brown, and beak black; the exterior of the tarsus is grey, the under surface of a reddish flesh-colour. In its winter dress the upper part and sides are blackish, and without the white spots, and the under surface white; the breast black, streaked with white. The young are clad in a similar garb, but are without the white streaks upon the breast.

The Northern Diver is common on all the coasts of the North Sea, as well as on the inland lakes of high latitudes. It appears on the coast of Great Britain in the autumn, and remains during the winter, going at the breeding season; except at that time, it lives at sea, following the shoals of herrings and sprats; it also resorts to arms of the sea and sandy bays, floating lightly, with its body deep in the water; when alarmed, it swims with astonishing swiftness, and endeavours to escape by diving.

These birds breed on the Faroe Islands. Respecting their manner of nidification Mr. Porter, who observed them closely during the nesting season in Iceland, says:—"The Northern Diver breeds on the lochs of fresh water. In the nests I examined, a single egg was deposited. On the bare ground, but just out of water-mark, rather under a rugged bank on some broken ground, I was successful in finding two nests. I allowed the single egg to remain in one of them in the expectation that another egg would be laid to it, but was disappointed. The old bird was very shy, and always left the egg on our approach, when at a great distance off, taking to the water and keeping so far from the side as not to be within shot." In the breeding season they frequent islands, making their nests of dead herbage near the water's edge. The eggs, usually two in number, are dark olive-brown, with a few umber-brown spots, and are three inches six lines long by two inches three lines broad. The mother lies flat on the eggs, and, if disturbed, pushes herself along the ground with her feet, diving as soon as she reaches the water. The young are able in a day or two after birth to follow their mother to the water, and are able to swim and dive well. They are fed during the first fortnight with food from the crop of their parent. The voice of this bird is loud, plaintive, and much varied in tone.

Montagu tells us that, "A Northern Diver taken alive was kept in a pond for some months. In a few days it became extremely docile, would come at a call from one side of the pond to the other, and would take food from the hand. The bird had received an injury in the head which had deprived one eye of its sight, and the other was a little impaired; but, notwithstanding, it could, by incessantly diving, discover all the fish that was thrown into the pond. In default of fish it would eat flesh. It