Birds of the Colorado Valley


Book Description

As originally projected for publication in a different connection, the work consisted merely of a report upon the peculiar features of bird-life in the area under consideration, with biographies of the species not treated in the "Birds of the Northwest". But the author's resources have proved to be so largely in excess of the requirements of such a report that the work has outgrown the limits of a single volume, and become a full exposition of our present knowledge of the subject, by the incorporation of much technical matter concerning North American ornithology at large, hitherto the private possession of the author and now first made accessible to the public.




The Migration of North American Birds (1935)


Book Description

This zoology book was written in the mid 20C by the well-know biologist and it deals with migration of various bird species that occupy the territory of North America. The notion of migration was something that always interested scientists, and this book reveals many facts about this phenomenon.




The Ibis


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University of Colorado Studies


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Birds of the Lower Colorado River Valley


Book Description

Discusses the status, distribution, ecology, migration and vagrancy, food habits, and breeding biology of birds found in this area, and also suggests accessible areas for bird watching