. Bulletin of the British Ornithologists' Club. Vol. 86 12 Bulletin Photo by Pamela Harrison Symetrical albinism in a Skylark The interesting problems of symmetrical albinism in birds has been somewhat neglected, as indeed have most abnormal plumages, until in comparatively recent times, and even now no explanations cf such sym- metrical cases have been offered. Naturally enough explanations cf this condition must, in the present state of our knowledge, be speculative, though a number may be accounted for by a heterozygous state, they are genetic in origin and are therefore heredi
. Bulletin of the British Ornithologists' Club. Vol. 86 12 Bulletin Photo by Pamela Harrison Symetrical albinism in a Skylark The interesting problems of symmetrical albinism in birds has been somewhat neglected, as indeed have most abnormal plumages, until in comparatively recent times, and even now no explanations cf such sym- metrical cases have been offered. Naturally enough explanations cf this condition must, in the present state of our knowledge, be speculative, though a number may be accounted for by a heterozygous state, they are genetic in origin and are therefore hereditary in nature, and occur irregularly in the species affected. As has recently been shown by different authors, there are various causes for the albinistic state, amongst which may be mentioned trauma (Nero, 1954). Jeffery G. Harrison (1953) describes symmetrical albinism in the wings of four different species as follows, Goosander, Mergus mer- ganser merganser Linnaeus, Golden Plover, Charadrius apriearius Lin- naeus, Rook, Corvus frugilegus frugilegus Linnaeus and Curlew, Numenius arquata arquata (Linnaeus); the last case would appear to have been leucistic as the wings were described as isabelline. In this paper it is postulated that there is some physiological defect in. 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 British Ornithologists' Club. London : British Ornithologists' Club
Size: 1548px × 1614px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishornithologistsclub, bookcentury1900, bookcollec
