A floristic account is provided for the cactus family as part of the vascular plant flora of the contiguous protected areas of Organ Pipe Cactus National Monument, Cabeza Prieta National Wildlife Refuge, and the Tinajas Altas Region in the heart of… See more
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This report summarizes my efforts to describe the distribution, abundance, habitat, and biogeographical relationships of breeding birds in montane vegetation communities in the Sky Islands and adjacent Sierra Madre Occidental of northwest Mexico.… See more
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Bighorn sheep (Ovis canadensis) were not known to live on Tiburón Island, the largest island in the Gulf of California and Mexico, prior to the surprisingly successful introduction of 20 individuals as a conservation measure in 1975. Today, a stable… See more
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The Santa Cruz River and other riparian areas in the watershed have long been the backbone of the region’s natural and cultural heritage. This rich history is highlighted in the State of the Santa Cruz River. This companion document, State of the… See more
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The Santa Cruz River has a compelling human history. Telling this story can awaken a deeper emotional curiosity about the river and entice more people to explore the region’s rich heritage. The Sonoran Institute is not the first to recognize and… See more
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Erpetogomphus molossus is described from 3 male and 3 female specimens (holotype and allotype in collection of Insti- tuto Biologico de la Universidad Nacional Autónoma de México) from the intermittent pine-oak woodland of the Yécora municipio in… See more
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Investigations of processes that drive animal distribution and abundance are often approached at one of two different scales and therefore focus on different processes. At local scales, animals are thought to select home ranges or territory patches… See more
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The Sierra Bacadéhuachi in east-central Sonora is the westernmost mountain range in the Sierra Madre Occidental (SMO), located east of Bacadéhuachi, Municipio de Bacadéhuachi, 34 km east of the Chihuahua border, and 165 km south of the Arizona… See more
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The Ciénega de Saracachi area, including Arroyo Santo Domingo and Cañón Quemado, is in the Municipio de Cucurpe in north-central Sonora (30°21’33”N 110°35’29”W), ca. 105 km south of the Arizona border. The vegetation is cottonwood-willow riparian… See more
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The floras of the tropical vegetation in the Sky Island Sierra la Madera (SMA) near Moctezuma in northeastern Sonora (30°00’N 109°18’W) and the Yécora (YEC) area in the Sierra Madre Occidental (SMO) in eastern Sonora (28°25’N 109°15”W) were… See more
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Ejido Tonibabi is located 12 kilometers east-northeast of Moctezuma in east-central Sonora, México (29°50’16’’N 109°33’45’’W, 780 m elevation). The vegetation is riparian in the wetlands and foothills thornscrub on slopes. The flora was inventoried… See more
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Flowery rhetoric often gives birth to new terms that convey images and concepts, lead to inspiration and initiative. On the 1892-1894 expedition to resurvey the United States-Mexico boundary, Lieutenant David Dubose Gaillard described the Arizona-… See more
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