Endangered Species & Species of Concern
- The Endangered Species Act of 1973
Bald Eagle
Humpback Chub
- SCORE 1999 Draft Report - Humpback Chub
- Endangered Fish Threatened by Asian Fish Tapeworm, August 2004 -- .pdf format (644 KB)
- Experimental Effort To Benefit Native Fish Being Expanded In Grand Canyon (08/15/03)
- Flows From Glen Canyon Dam to Temporarily Increase as Summer Test for Endangered Species Studies Draws to Conclusion (09/01/00)
- Humpback Chub: Factors Affecting Persistence -- .pdf format (1.1 MB)
- Upper Colorado River Endangered Fish Recovery Program - Humpback chub (Gila cypha)
- USGS Fishing for Success in the Grand Canyon (03/04/03)
Kanab Ambersnail
- Arizona Game & Fish - Kanab Ambersnail (Oxyloma haydeni kanabensis)
- The ecology of Kanab ambersnail (Succineidae: Oxyloma haydeni kanabensis Pilsbry, 1948) at Vaseys Paradise, Grand Canyon, Arizona : 1995 final report / by Lawrence E. Stevens and Frank R. Protiva, Dennis M. Kubly, Vicky J. Meretsky, James Petterson -- .pdf format (1.81 MB)
- The endangered Kanab Ambersnail at Vasey's Paradise, Grand Canyon, Arizona : 1997 final report / Lawrence E. Stevens, Vicky J. Meretsky, Clay B. Nelson and Jeff A. Sorenson -- .pdf format (1.69 MB)
- Final Year End Report : Kanab Ambersnail Monitoring at Vaseys Paradise/ C. Larue, N. L. Brown, and J. R. Spence -- .pdf format (962 KB)
- The impacts of an experimental flood from Glen Canyon Dam on the endangered Kanab Ambersnail at Vaseys Paradise, Grand Canyon, Arizona : L.E. Stevens and V.J. Meretsky -- .pdf format (2.89 MB)
- Morphological and Genetic relatedness among Succineid landsnails in the United States and Canada, with emphasis on the endangered Kanab Ambersnail (Oxyloma Haydeni Kanabensis): draft final report, 5 Oct. 2000 / Lawrence E. Stevens, Paul Keim, Mark Miller, and Shi-Kuei Wu -- .pdf format (2.82 MB)
- NPS - Kanab Ambersnail
- SCORE 1999 Draft Report - Kanab Ambersnail
Peregrine Falcon
Razorback Sucker
- Razorback Sucker (Xyrauchen texanus) Recovery Goals : amendment and supplement to the Humpback Chub Recovery Plan / U.S. Fish and Wildlife Service, Mountain Prairie Region (6) -- .pdf format (21.5 MB)
- SCORE 1999 Draft Report - Razorback Sucker
- Upper Colorado River Endangered Fish Recovery Program - Razorback sucker (Xyrauchen texanus)
Southwestern Willow Flycatcher
- SCORE 1999 Draft Report - Southwestern Willow Flycatcher
- Sonoran Desert Conservation Plan - Southwestern Willow Flycatcher Empidonax traillii extimus
- Southwestern willow flycatcher 2000 survey and nest monitoring report : Nongame and Endangered Program Technical report 175 / C.E. Paradzick, T.D. MacCarthey, R.F. Davidson, J.W. Rourke, M.W. Sumner and A.B. Smith -- .pdf format (4.56 MB)
- Southwestern Willow Flycatcher 2002 Survey and Nest Monitoring Report A.B. Smith, A.A. Woodward, P.E.T. Dockens, J.S. Martin and T.D. McCarthey -- .pdf format (3.04 MB)
Miscellaneous Documents and Links
- Endangered and Threatened Wildlife and Plants : Determination of Critical Habitat for Four Colorado River Endangered Fishes; Final Rule / United States Fish and Wildlife Service View Document -- .pdf format (462 KB)
- NPS - Threatened & Endangered Species in the Grand Canyon Area -- .pdf format (40 KB)
- Upper Colorado River Endangered Fish Recovery Program
- Why some native fish in the upper Colorado River basin are endangered
- Wildlife: Terrestrial and Endangered Resources Program -- .pdf format (298 KB)