. [Collected reprints, 1911-1931. Ornithology; Mammals. Fig. E. Tails of Dendragapus fuliginosus sifkensis, showing variation due to sex and age, about % natural size, a, adult male, in second year or older ( Z. no. 133) ; 6, immature male, during first year ( Z. no. 136) ; c, adult female ( no. 134); d, immature female ( no. 135). Relative roundness of tail, besides being a marked age character in certain forms, is also a feature in geographical variation. The sub- species howardi was described as having the tail longer and more graduated than sierrae (Dickey and van Rosse
. [Collected reprints, 1911-1931. Ornithology; Mammals. Fig. E. Tails of Dendragapus fuliginosus sifkensis, showing variation due to sex and age, about % natural size, a, adult male, in second year or older ( Z. no. 133) ; 6, immature male, during first year ( Z. no. 136) ; c, adult female ( no. 134); d, immature female ( no. 135). Relative roundness of tail, besides being a marked age character in certain forms, is also a feature in geographical variation. The sub- species howardi was described as having the tail longer and more graduated than sierrae (Dickey and van Rossem, 1923, p. 168), and the comment is made that "throughout the range of D&ndragap'ws obscurus in California there is a gradual geographic variation which particularly affects the length and graduation of the tail.'' This same variation can be traced beyond California. From the northern limit. 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 Swarth, Harry Schelwald, 1878-. s. l. , s. n.
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Keywords: ., bookcentury1900, bookpublisherslsn, booksubje, booksubjectmammals
