Publisher's Synopsis
Excerpt from A Contribution to the Ornithology of the Orinoco Region
Where colors are given of the eye and naked parts about the head, of the bill, and of the feet, they are the result of a direct comparison with the colored plates in Ridgway's Nomenclature of Colors and were made in the field from freshly killed specimens.
For almost all groups keys for the more ready determination of the various genera, and their species, have been inserted, following the preliminary observations under each of' the family headings. Many of these keys, with slight alterations, were prepared by the writer for his convenience in the identification Of specimens in the field. And while the keys were constructed primarily as aids in identifying the species known to inhabit the immediate valley of the Orinoco, there are frequently included the necessary characters distinguishing many species known to be found in contiguous territory. It must be under stood, however, that no effort has been made to supply keys to the birds of other regions of northern South America.
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