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155. RED-THROATED DIVER. Colymbus septentrionalis, Linnaeus. French, "Plongeon
154. BLACK-THROATED DIVER. Colymbus arcticus, Linnaeus. French, "Plongeon
Blyth has seen specimens of Lanius rufus and of Colymbus glacialis which had assumed whilst young, in a quite anomalous manner, the adult plumage of their parents. F. Forel has described the case of three vigorous young birds, out of a brood of four, which were born pure white.
Many of the jackets of these people, and particularly those of the females, were lined with the skins of birds, having the feathers inside; and they had also in the boat several other skins in a prepared state, taken from the throat of the colymbus glacialis, which splendid bird, though we had twice found its skin in possession of the Esquimaux, we had yet not met with ourselves.
Of birds we remarked: the Aquila leucocephala, Astur, Corvus Corone and Stelleri, and some varieties of the species Turdus, Sylvia, Troglodytes, Parus, Alcedo, Picus, Ardea, Hæmatopus, Scolopax, Charadrius, Anas, and Colymbus. Trochilus rufus is not only often found here, but also under sixty degrees of latitude. A small shoal of Procellaria furcata was once driven into the Bay by stormy weather.
Colours, admired alike by man and animals; bright, due to sexual selection; bright, among the lower animals; bright, protective to butterflies and moths; bright, in male fishes; transmission of, in birds. Colquhoun, example of reasoning in a retriever. Columba passerina, young of. Colymbus glacialis, anomalous young of. Comb, development of, in fowls. Combs and wattles in male birds.
The summer birds had by this time entirely deserted us, leaving for our winter companions the raven, cinereous crow, ptarmigan, and snow-bird. The last of the waterfowl that quitted us was a species of diver of the same size with the Colymbus arcticus but differing from it in the arrangement of the white spots on its plumage, and in having a yellowish-white bill.
These were all young birds or adults in winter plumage; and I have one, a young bird of the year, killed in the Guernsey harbour late in November, 1876. It is included in Professor Ansted's list, but only marked as occurring in Guernsey. There is one specimen, a young bird of the year, in the Museum. GREAT NORTHERN DIVER. Colymbus glacialis, Linnaeus. French, "Plongeon imbrim."
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