. The water birds of North America [microform]. Birds; Water-birds; Oiseaux; Oiseaux aquatiques. P. dilophus, nuptial dress. marked increase of size to the northward.) A very careful e.\aminutio!i and comparison of more than fifty examples of these birds, very dearly proves the identity of the three supposed species respectively called by authors P. dilo- phus, P. floruhmm, and P. cincinnatm, the latter representing a very marked gcjraphical modi- ticat-ion of color ; the so-called yfonWajiwa, on the other hand, rejire- senting merely a slight modidcation of size. The examination in question s
. The water birds of North America [microform]. Birds; Water-birds; Oiseaux; Oiseaux aquatiques. P. dilophus, nuptial dress. marked increase of size to the northward.) A very careful e.\aminutio!i and comparison of more than fifty examples of these birds, very dearly proves the identity of the three supposed species respectively called by authors P. dilo- phus, P. floruhmm, and P. cincinnatm, the latter representing a very marked gcjraphical modi- ticat-ion of color ; the so-called yfonWajiwa, on the other hand, rejire- senting merely a slight modidcation of size. The examination in question shows the geographical variation in this species to be of two kinils, viz. : (1) A more or less marked increase of size to the northward, and (2) a gradual change from uniform glossy black nuptial crests, in east- ern birds, to crests entirely pure white, or with merely a slight admixture of black, Iwre space on the head, and gular sac, rich orange. Feet and claws ; "P. floridanus: " â " Adult male, in s])ring: Upper mandible black, along the basal margins bright blue ; lower bright blue, curiously spotted with â '. Iris light green, margins of eyelids light blue, spotted with white. Bare space on tile head and , r sac ricii orange. Feet and claws grayish ;. P. dilophits cincintiatus, nitptial dress. %. 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 Baird, Spencer F. , 1823-1887; Brewer, T. M. (Thomas Mayo), 1814-1880. Boston : Little, Brown
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Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectbirds, bookyear1884
