The Distribution of Bird-Life in Colombia; a Contribution to a Biological Survey of South America
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In our eReader you can find the full English version of the book. Read The Distribution of Bird-Life in Colombia; a Contribution to a Biological Survey of South America Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Distribution of Bird-Life in Colombia; a Contribution to a Biological Survey of South America
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Speci- mens labeled "Quito" doubtless were collected at the upper limits of the range of the species. They agree with others from Naranjo, Prov. Guayas, and from Esmeraldas, showing that this form apparently occupies the entire humid Tropical Zone of western Ecuador.
One of six Esmeraldas specimens approaches connectens in having the breast barred while of six Barbacoas specimens three have the upperparts paler than in connectens and in this respect are nearer nigricapillus. As might be expecte...d, therefore, this is evidently the area of intergradation between these two forms while somewhere between Cocal and Buenaventura connectens merges with schotti. The region from Buenaventura to Es- meraldas is evidently, therefore, the area of intergradation of schotti with nigricapillus, and this intergrading form in the'region of its typical develop- ment differs sufficiently from the forms it connects to deserve a name of its own. Certainly it could not satisfactorily be referred to one or the other.
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To quickly assess the difficulty of the text, read a short excerpt:
Speci- mens labeled "Quito" doubtless were collected at the upper limits of the range of the species. They agree with others from Naranjo, Prov. Guayas, and from Esmeraldas, showing that this form apparently occupies the entire humid Tropical Zone of western Ecuador.
One of six Esmeraldas specimens approaches connectens in having the breast barred while of six Barbacoas specimens three have the upperparts paler than in connectens and in this respect are nearer nigricapillus. As might be expecte...d, therefore, this is evidently the area of intergradation between these two forms while somewhere between Cocal and Buenaventura connectens merges with schotti. The region from Buenaventura to Es- meraldas is evidently, therefore, the area of intergradation of schotti with nigricapillus, and this intergrading form in the'region of its typical develop- ment differs sufficiently from the forms it connects to deserve a name of its own. Certainly it could not satisfactorily be referred to one or the other.
What to read after The Distribution of Bird-Life in Colombia; a Contribution to a Biological Survey of South America?
You can find similar books in the "Read Also" column, or choose other free books by Frank Michler Chapman to read onlineMoreLess
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