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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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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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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Situated in the topographically complex transition between the Neotropics and the temperate biomes of North America, the state of Sonora, Mexico, has an extraordinarily diverse herpetofauna. Surprisingly little research has been conducted on the… See more
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For thousands of years, people in the arid West have built their communities near rivers that supply drinking water, serve as navigation corridors, and support hundreds of plant, fish, and wildlife species. The Upper Santa Cruz is such a river,… See more
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Devil’s Canyon is located in Pinal County Arizona approximately 6 km east of the town of Superior in the Globe Ranger District of the Tonto National Forest. The area is generally rugged with deep canyons and is defined by its complex rock formations… See more
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