The Rio Yaqui drainage basin of northwestern Mexico comprises about 73,000 km of the most inaccessible and rugged terrain in western North America (Blásquez 1959). An average annual discharge of almost 2,800 ha2 makes the Rio Yaqui one of the major… See more
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Held in Tucson, Arizona. Foreward: The material offered in this symposium is both urgently needed and late in coming. Only in very recent years have scientists and managers begun to shift their perspective on riverine systems away from localized,… See more
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The Monte Desert of Argentina and the Sonoran Desert of North America are very similar in most aspects of their physical environments. The origins and the degree of affinity of thefaunas of three classes of vertebrates in the two deserts are… See more
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Marshall, C. J. and J. K. Liebherr. 1976. Cladistic Biogeography of the Mexican Transition Zone. Journal of Biogeography 27(1): 203-216. Biogeographic relationships among nine montane areas of endemism across the transition zone between North and… See more
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Woodland of mixed pines and oaks is familiar mountain scenery in Mexico, whence it extends into southeastern Arizona along with many kinds of Mexican birds. This woodland occupies a belt from about 5500 to 6500 feet in elevation between encinal (oak… See more
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Aldo Leopold's son, Starker Leopold, reviews changes to the Rio Gavilan region in the northern Sierra Madre since he was a kid.
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Vegetation and Flora research from 1938 to 1941 in the Rio Bavispe / Sierra El Tigre region. At that time White said that the area "...certainly is one of the least known regions of the North Mexican border" and "has been almost completely neglected… See more
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As initially projected, this report would have been considerably larger. Fuller discussion of the systematics of many species would have been desirable and the inclusion of life-history observations and allied subjects would have added considerably… See more
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The southern half of the state of Arizona. may be briefly characterized as a relatively level plain studded with numerous hills and mountains. The plain rises from elevations of a few hundred feet along the Colorado River to as much as 4,500 and 5,… See more
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A descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees. Edgar Alexander Mearns, Published April 13, 1907 View Mammals of the Mexican boundary of the United… See more
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Preface: The initial idea of the compilation of this work was to give the reading public an authentic record of the private life of the Apache Indians, and to extend to Geronimo as a prisoner of war the courtesy due any captive, i.e., the right to… See more
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A historical account including extensive stay in southern Arizona (Tucson, Tubac, Santa Rita Mountains, Sonoita, and other areas) from the early 1860s. This is one of the most depopulated and dangerous times generally in southern Arizona. Apaches… See more
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