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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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 Río Yaqui river basin (RYRB) is the largest in northwest Mexico, both in terms of area and volume of flow. Water resources in the region are under increasing stress due to intensive use for agriculture and urban growth, compounded by climate… See more
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Known from only a handful of localities in the Sierra Madre Occidental of western Mexico, the Spotted Box Turtle, Terrapene nelsoni (Family Emydidae), remains one of the least known chelonian species of North America. Only at the type locality and… See more
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Oct. 5th, 2011 finding by the U.S. Fish and Wildlife Service that the cactus ferruginous pygmy-owl (Glaucidium ridgwayi cactorum) does not warrant protection from the Endangered Species Act. "We, the U.S. Fish and Wildlife Service (Service),… See more
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For thousands of years, rivers in the arid Southwest have sustained people and supported an abundance of plants and wildlife. Though at times unnoticed, the numerous services that these rivers perform provide substantial benefits to the people… See more
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Details of trip taken to Sonora in March 2011 in search of the masked bobwhite, which is on the brink of extinction in the wild in Sonora as of 2011.
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Investigative Report: Macho B, January 19, 2010This report contains information that has been redacted pursuant to 5 U.S.C. §§ 552(b)(2), (b)(6), and (b)(7)(C) of the Freedom of Information Act. Supporting documentation for this report may be… See more
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Fire is a dominant ecological process in almost all landscapes of La Frontera. Fire histories from throughout the region on the United States side of the border show that, before circa 1900, extensive surface fires occurred within pine-dominant… See more
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