This section includes some of the many outstanding organizations and agencies involved with the desert ecology of Tucson.

• Arizona Cooperative Extension; University of Arizona (http://cals.arizona.edu/extension/)
• Arizona Department of Water Resources (http://www.adwr.state.az.us)
• Arizona Game and Fish Department (http://www.gf.state.az.us)
• Arizona Geological Society (http://www.arizonageologicalsoc.org/)
• Arizona Herpetological Association (http://www.azherps.com/index.php)
• Arizona Historical Society Museum (http://www.arizonahistoricalsociety.org/)
• Arizona Native Plant Society (http://aznps.org/)
• Arizona Poison Control System (1-800-222-1222)
• Arizona State Museum (http://www.statemuseum.arizona.edu/)
• Arizona State Parks (http://www.pr.state.az.us)
• Arizona Trail Association (http://www.aztrail.org/)
• Arizona-Sonora Desert Museum (http://www.desertmuseum.org/)
• Boyce Thompson Southwestern Arboretum (http://ag.arizona.edu/BTA)
• Bureau of Land Management: Arizona (http://azwww.az.blm.gov)
• Desert Botanical Garden (http://www.desertbotanical.org/)
• International Wildlife Museum (http://www.thewildlifemuseum.org)
• Office of Arid Lands Studies (http://www.arid.arizona.edu/)
• Pima County Natural Resources, Parks and Recreation Department (http://www.pima.gov/nrpr/index.htm)
• Reid Park Zoo (http://www.tucsonzoo.org/)
• Saguaro National Park (http://www.nps.gov/sagu/)
• Sierra Club (http://www.sierraclub.org)
• Sonoran Arthropod Society, Institute (http://sasionline.org)
• Southeast Arizona Butterfly Association (http://www.naba.org/chapters/nabasa/home.html)
• Water Conservation Alliance of Southern Arizona (http://www.watercasa.org/)
• Western National Parks Association (http://www.wnpa.org/)
• Southwestern Herpetologists Society (http://www.swhs.org)
• The Heard Museum (http://www.heard.org)
• The Nature Conservancy (http://www.tnc.org/)
• Tohono Chul Park (http://www.tohonochulpark.org/)
• Tucson Audubon Society (http://www.tucsonaudubon.org/)
• Tucson Botanical Gardens (http://www.tucsonbotanical.org/)
• Tucson Herpetological Society (http://www.azreptiles.com)
• Tucson Water (http://www.ci.tucson.az.us/water/)
• University of Arizona Herbarium (http://ag.arizona.edu/herbarium/)
• U.S. Fish and Wildlife Service (http://www.fws.gov)
• U.S. Forest Service (http://www.fs.fed.us)
• Water Resources Research Center (http://ag.arizona.edu/azwater)