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Southwestern Willow Flycatcher Detections and Monitoring


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Southwestern Willow Flycatcher survey data collected along the Colorado River in Grand Canyon National Park. Data are in the form of tables included in annual summaries from 1998 to 2000.


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Original FGDC Metadata

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The Southwestern Willow Flycatcher (Empidonax traillii extimus) was listed as an endangered species in 1995. In 1997, the U.S. Fish and Wildlife Service designated critical habitat for this flycatcher, including portions of the Colorado River that are included in this project. Although the relative significance of the Grand Canyon Willow Flycatchers is slightly lower due to locating more breeding pairs throughout the southwest, the Grand Canyon birds are still important. Because of the endangered status and low numbers of this bird range-wide, conservation of all breeding sites is crucial to recovery of the bird. Furthermore, information on how this small, widely-dispersed population fares is of value to managing the subspecies as a whole. Finally, Willow Flycatcher nesting habitat in the Grand Canyon is managed by Grand Canyon National Park, and is also affected by operation of Glen Canyon Dam by the Bureau of Reclamation. Because of the above concerns for conserving the Southwestern Willow Flycatcher, those two agencies and other cooperators (Arizona Game and Fish Department, USFWS, USGS/BRD) have chosen to continue inventory and monitoring of the bird in the Grand Canyon



  • Forest and Rangeland Ecosystem Science Center (FRESC)



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