We studied annual variation in reproductive activity and productivity of the Thick-billed Parrot (Rhynchopsitta pachyrhyncha) during a five year period (1997-2001), in five nesting areas at the Sierra Madre Occidental in Mexico. Two breeding areas… See more
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Measurements taken on the skull of a bear shot in northern Sonora, Mexico, in 1976 revealed that the skull is from a brown bear (Ursus arctos). The skull appears to be that of a juvenile (sex unknown) and, to our knowledge, represents only the… See more
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This plan covers the management of the Baboquivari Peak Wilderness and Coyote Mountains Wilderness, units of the BLM’s National Landscape Conservation System (NLCS). Baboquivari Peak Wilderness (2,065 acres) and Coyote Mountains Wilderness (5,080… See more
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Created as part of a collection of Arizona river overview documents titled "River of the Month Series, Celebrating Arizona’s Rivers". These reports were prepared and supported by Environmental Defense Fund, Sonoran Institute, Sierra Club, Grand… See more
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Marsh & Associates native fish labs have made available these resources. From their Minckley library search page: The entire reference library is available to view from this website, but not all references will have complete versions of the… See more
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Created as part of a collection of Arizona river overview documents titled "River of the Month Series, Celebrating Arizona’s Rivers". These reports were prepared and supported by Environmental Defense Fund, Sonoran Institute, Sierra Club, Grand… See more
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The Madrean Archipelago Biological Assessment (MABA) “bioblitz” expedition to Sierra de la Madera (Oposura) near Moctezuma, Sonora, Mexico from 29 July–7 August 2010 included a land snail inventory. Five people searched for both macro- and… See more
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Created as part of a collection of Arizona river overview documents titled "River of the Month Series, Celebrating Arizona’s Rivers". These reports were prepared and supported by Environmental Defense Fund, Sonoran Institute, Sierra Club, Grand… See more
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This flora of the vascular plants of the Tinajas altas region, within the Lower colorado valley subdivision of the Sonoran desert of southwestern arizona, includes the present-day species as well as fossils recovered from packrat middens. The… See more
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How do you gauge wilderness qualities? Consider this: deep in the Whetstone Mountains sits a wooden corral with a small metal line shack, remnants of an early cattle ranching operation. Far from any road, its floor has newspapers from 1939 resting… See more
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Created as part of a collection of Arizona river overview documents titled "River of the Month Series, Celebrating Arizona’s Rivers". These reports were prepared and supported by Environmental Defense Fund, Sonoran Institute, Sierra Club, Grand… See more
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Jaguars are endangered in Mexico and the United States, necessitating careful monitor- ing of population status. We determined minimum numbers of jaguars and sympatric pumas in a small population in northern Sonora, Mexico, the nearest known… See more
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