. Bulletin of the British Ornithologists' Club. Bulletin Vol. 82. Photo: Dennis Cleaver Macronyx croceus (Vieillot) Photograph showing size variation in three races of the Yellow-throated Longclaw Macronyx croceus. The smaller overall size of the central group of three specimens (M. c. tertius) compared with skins of M. c. viiltiirnus (left group), and the much smaller physical proportions o^ the Upper Guinea populations of M. c. croceus (right group) (see discussion in the text) can be readily seen. The darker yellow abdominal surface in M. c. croceus when compared with M. c. tertius c
. Bulletin of the British Ornithologists' Club. Bulletin Vol. 82. Photo: Dennis Cleaver Macronyx croceus (Vieillot) Photograph showing size variation in three races of the Yellow-throated Longclaw Macronyx croceus. The smaller overall size of the central group of three specimens (M. c. tertius) compared with skins of M. c. viiltiirnus (left group), and the much smaller physical proportions o^ the Upper Guinea populations of M. c. croceus (right group) (see discussion in the text) can be readily seen. The darker yellow abdominal surface in M. c. croceus when compared with M. c. tertius can also be discerned. Each horizontal division in the photograph represents one inch. Literature Cited: Chapin, James P. 1953. Birds of the Belgian Congo, part 3, p. 82. Clancey, P. A. 1952A. Annals of the Natal Museum, vol. xii, 2, p. 263. Clancey, P. A. I952B Journal of the Scientific Society of the University of Natal, vol. viii, pp. 7-8. Clancey. P. A. 1958. Ostrich, vol. xxix, 2, pp. 75-78. Friedmann, H. 1930. Occasional Papers of the Boston Society of Natural History, vol. 5, pp. 263-266. Gyldenstolpe, N. 1924. Kungl. Svenska Vetenskapsakademiens Handlingar, Tredje Serien, Band i, No. 3, pp. 81-82. McLachlan, G. R. and Liversidge, R. 1957. Roberts" Birds of South Africa, p. 376. Ridgway, R. 1912. Color Standards and Color Nomenclature. Washington. Roberts, A. 1940. Birds of South Africa, p. 296. van Someren, V. G. L. 1922. Novitates Zoologicae, vol. xxix, I, p. 179. van Someren, V. G. L. 1932. Novitates Zoologicae, vol. xxxvii, p. 336. Vincent, J. 1952. Check List of the Birds of South Africa, p. 63. White, C. M. N. 1960. in Peters Check List of Birds of the World, vol. ix, p. 143. White, C. M. N. 1961. Bulletin of the British Ornitholounsts Club, vol. 81, 2, p. 34. A revision of Balkan, Aegean and Anatolian Crested Larks hy GiORCiK E. Watson Received 15th April, 1961 Geographic variation in the Crested Lark, Galcrida cristaia, is obscured by a fair amount of correla
Size: 2107px × 1186px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishornithologistsclub, bookcentury1900, bookcollec
