. The Cambridge natural history. Zoology. COLYMBIDAE 51 w'liite, and the throat is crossed by two bands of white with liiugitudinal black bars, while the head and neck are black with ;i purplish gloss, changing to green below. In winter most 1 )ivers are found down to the northern tropic, at which season the throat becomes white, as it is in the young, in which the feathers of the upper parts are duller with whitish edges. The sexes are similar; the bill is normally black, and the feet are 1 iluish or greenish grey. The downy chicks are sooty above. Divers are not usually gregarious, and unles
. The Cambridge natural history. Zoology. COLYMBIDAE 51 w'liite, and the throat is crossed by two bands of white with liiugitudinal black bars, while the head and neck are black with ;i purplish gloss, changing to green below. In winter most 1 )ivers are found down to the northern tropic, at which season the throat becomes white, as it is in the young, in which the feathers of the upper parts are duller with whitish edges. The sexes are similar; the bill is normally black, and the feet are 1 iluish or greenish grey. The downy chicks are sooty above. Divers are not usually gregarious, and unless driven by stormy weather to inland waters, are essentially marine, except during. Fig. 15.—Great Northern Diver. r/lacialis. x |. the breeding season, when they ascend the rivers and seek their customary nesting-sites on the moors, the Black-throated species showing a somewhat greater preference than the rest for islands in the lakes they frequent, but the Eed-throated often selecting small pools, or even " flows," among the heather. The two eggs, greenish- or reddish-brown in hue, with blackish and grey blotches and spots, are laid on a mere depression in the grass or sand close to the water's edge, or upon a mass of green vegetation which is occasionally semi-natant. Incubation is said to last four weeks. As a rule the female performs this duty, lying flat upon her eggs, and gliding or scrambling off when disturbed, whence a distinct track is often visible upon the turf. On leaving the land u dive is taken. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harmer, S. F. (Sidney Frederic), Sir, 1862-; Shipley, A. E. (Arthur Everett), Sir, 1861-1927. London : Macmillan and Co. ; New York : The Macmillan Company
Size: 1913px × 1306px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorsh, bookcentury1800, bookdecade1890, booksubjectzoology
