. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. Fig. 45. Secondary win^-feathers of Pipra ddldosa (from Mr. Solater, in **Proo. Zool. Soc," 1860. The three upper feathers, a, b, c, from the male; the three lower corresponding feathers, d^ e,/, from the female. a and d, fifth secondary wing-feather of male and female, upper surface. b and e, sixth secondary, upper surface. c and/, seventh secondary, upper surface. season, and the diversity of th© means fo
. The descent of man, and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings; Sexual selection in animals; Sexual dimorphism (Animals); Sex differences. Fig. 45. Secondary win^-feathers of Pipra ddldosa (from Mr. Solater, in **Proo. Zool. Soc," 1860. The three upper feathers, a, b, c, from the male; the three lower corresponding feathers, d^ e,/, from the female. a and d, fifth secondary wing-feather of male and female, upper surface. b and e, sixth secondary, upper surface. c and/, seventh secondary, upper surface. season, and the diversity of th© means for producing such sounds, are highly remarkable. We thus gain a high idee of their importance for sexual purposes, and are reminded of the conclusion arrived at as to insects. It is not difficult to imagine the steps by which the notes of a bird, primarily used as a mere call or for some other purpose, might have. 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 Darwin, Charles, 1809-1882. New York : A. L. Burt
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
