This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...of females vary among themselves to such an extent that it is difficult to say just what should be considered the normal phase of coloration; they are all duller, however, than those of punctatus, but not so dark as a rule as those of atrinucha. It appears, therefore, that the Santa Marta form is worthy of recognition, ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ...of females vary among themselves to such an extent that it is difficult to say just what should be considered the normal phase of coloration; they are all duller, however, than those of punctatus, but not so dark as a rule as those of atrinucha. It appears, therefore, that the Santa Marta form is worthy of recognition, and it was accordingly provided with a name by the writer in 1915. The description of Thamnophilus gorgona Thayer and Bangs (Bulletin Museum of Comparative Zoology, XLVI, 1905, 95) seemed at the time to preclude the possibility of such being the same form, but actual comparison proves otherwise. Males from Gorgona Island differ from Santa Marta examples only in having a little more gray feather-tipping on the forehead--a difference of no consequence. Females from the same locality are very uniform in being more richly colored, deeper buffy below, and more rufescent above, than the majority of Santa Marta examples of that sex, but they are matched so absolutely by several of our specimens that their separation would not be justified, at least on the basis of present material. While this settlement of the case disposes conclusively of the difficulties encountered by Mr. Ridgway in attempting to include Colombian specimens under atrinucha, it raises another question in distribution not so readily settled. Dr. Chapman has shown that in western Colombia atrinucha is the form which occurs, ranging over to the Magdalena Valley. If, therefore, the birds from Gorgona Island, lying off the west coast of Colombia, and the Santa Marta region are to be considered the same--and there are certainly no sufficient grounds for their separation in the judgment of the writer--we are confronted by a most peculiar case of discontinuous distribution. The only expla...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
