Please see below for links to many of the reports and publications written or coauthored by employees of SSRS, as well as articles or news outlets about the work of SSRS. Each one of these reports and publications represents countless hours of fieldwork, painstaking tedious work dealing with and analyzing data, and carefully writing and editing the reports. Sharing and disseminating the results of these efforts is one of our top priorities. If you can not find the report or publication you are looking for, or have questions about any of these, please contact us! We are more than happy to discuss our completed work with you!
2024
Coming soon: Avian Surveys on the The Nature Concervancy’s Frank and Joan Randall Preserve.
Coming Soon: Rangewide Survey of Western Yellow-billed Cuckoo CSWG (Competitve State Wildlife Grant)
2023
INVESTIGATING PINYON-JUNIPER BIRD COMMUNITIES IN NEW MEXICO TO INFORM CONSERVATION AND MANAGEMENT ACTIONS: REFERENCE CONDITION OCCUPANCY, PRODUCTIVITY, AND HABITAT USE, 2021-2023. Summary Report. November 2023. Prepared for the New Mexico Department of Game and Fish.
Yellow-billed Cuckoo and Southwestern Willow Flycatcher surveys at The Nature Conservancy’s Southeast Arizona Preserves. By Nick Beauregard. December 2023.
2023 Alkali Mariposa Lily and Blackbird Surveys on the Kern River Valley Heritage Foundation properties in Lake Isabella, CA. November 6, 2023. Prepared for the Kern River Valley Heritage Foundation by Annie Meyer and Staff.
Article: A Migrating Cuckoo Named Hummus Makes a Tasty Case for Land Conservation. By Lauren Leffer. Audubon Magazine, August 31, 2023. https://www.audubon.org/news/migrating-cuckoo-named-hummus-makes-tasty-case-land-conservation
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2019-2022 Summary Report Report to the Bureau of Reclamation, Boulder City, NV.
Pinyon Jay Surveys in the Rio Grande del Norte National Monument 2021 Report to U.S. Fish and Wildlife Service and Bureau of Land Management, Taos NM
Microclimate Refugia: Comparing Modeled to Empirical Near-Surface Temperatures on Rangeland. Robert B. Srygley, Jacob I. Dixon, and Patrick D. Lorch. 2023. Geographies 3(2), 344-358.
2022
Developing an adaptive management approach to cowbird control on the Santa Clara River, California. Parker et al. 2022. The Journal of Wildlife Management. DOI: 10.1002/jwmg.22284
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2022 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
INYO CALIFORNIA TOWHEE SURVEYS NAVAL AIR WEAPONS STATION CHINA LAKE, CA 2022. Prepared for Naval Air Weapons Station China Lake and Naval Facilities Engineering Command, SW. Prepared by Mary J. Whitfield and Nidia Jaime. October 2022.
AVIAN MONITORING FOR SPECIES AT RISK NAVAL AIR WEAPONS STATION CHINA LAKE, CA, 2021. Prepared for Naval Air Weapons Station China Lake and Naval Facilities Engineering Command, SW. Prepared by Mary J. Whitfield and Nidia Jaime. January 2022.
Informal Survey of Plants and Animals, Quarter Circle 5 Ranch. Prepared by Patrick Lorch and Mary Whitfield. June 2022.
2021
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2021 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
Western Yellow‐Billed Cuckoo Nest‐Site Selection and Success in Restored and Natural Riparian Forests Jenna Stanek et al. The Journal of Wildlife Management 1–12;2021;DOI:10.1002/jwmg.22020.
2020
Brown-headed Cowbird and Avian Population Monitoring in Anza-Borrego Desert State Park. Prepared for the California Department of Parks and Recreation. By John Stanek and Mary Whitfield. Submitted September 2020.
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2020 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
Western Yellow-billed Cuckoo Habitat Enhancement and Restoration in the Kern River Valley, CA, Final Report. September 30, 2016 – September 30, 2020. Prepared for U.S. Fish and Wildlife Service, Sacramento, CA 95825
2019
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2019 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
2018
Ecological genomics predicts climate vulnerability in an endangered southwestern songbird. Ruegg et al. 2018. Ecology Letters. doi: 10.1111/ele.12977
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2014 to 2018 Summary Report Report to the Bureau of Reclamation, Boulder City, NV.
2017
Monitoring Brown-headed Cowbird and Avian Populations in Anza Borrego Desert State Park. Prepared for the State of California. By John Stanek and Mary Whitfield. Submitted Oct 2017.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2017. Summary Report.
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2017 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
2016
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2016. Summary Report.
Yellow-billed Cuckoo Surveys on the Lower Colorado River, 2016 Annual Report Report to the Bureau of Reclamation, Boulder City, NV.
Poster: Desert washes during migration, Gran Chaco wintering by Western Yellow-billed Cuckoos. North American Ornithological Conference VI, August 2016, Washington DC.
2015
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2015. Report to the Bureau of Reclamation, Boulder City, NV.
Loop Migration by a Western Yellow-billed Cuckoo Wintering in the Gran Chaco Published in Western Birds.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2015. Summary Report.
2014
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2014. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2014. Summary Report.
2013
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2013. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2008-2012 Summary. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2013. Summary Report.
2012
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2012. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2012 Report to the U.S. Fish and Wildlife, Sacramento, CA.
2011
Flammulated Owl Surveys in Sequoia National Forest 2011. Report to the U.S. Fish and Wildlife, Sacramento, CA.
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Winter Distribution of Willow Flycatcher Subspecies. Published in The Condor.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2011. Report to the Bureau of Reclamation.
2010
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2010. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2010. Report to the U.S. Fish and Wildlife, Sacramento, CA.
2009
Southwestern Willow Flycatcher Monitoring and removal of Brown-headed Cowbirds on the South Fork Kern River in 2008. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
Summary of Flycatcher/Vireo Population Surveys, monitoring and Brown-headed Cowbird control at the South Fork Wildlife Area, Kern County. Letter report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2009. Report to the Bureau of Reclamation, Boulder City, NV.
Yellow-billed Cuckoo Surveys in the South Fork Kern River Valley: 2009. Report to the U.S. Fish and Wildlife, Sacramento, CA.
2008
Efficiency of stable isotope ratios in assigning endangered migrants to breeding and wintering sites. Published in Ecological Applications.
Southwestern Willow Flycatcher monitoring and removal of Brown-headed Cowbirds for the South Fork Kern River Valley in 2007. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
Yellow-billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado River: 2008. Report to the Bureau of Reclamation, Boulder City, NV.
Winter Distribution of the Willow Flycatcher (Empidonax traillii) in Guatemala. Report to the U.S. Bureau of Reclamation, Boulder City, NV.
2007
Southwestern Willow Flycatcher monitoring and removal of Brown-headed Cowbirds for the South Fork Kern River Valley in 2006. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
Winter Distribution of the Willow Flycatcher (Empidonax traillii) in Guatemala and Mexico. Report to U.S. Bureau of Reclamation, Boulder City, NV.
2006
Polygyny and extra-pair paternity in a population of Southwestern Willow Flycatchers. Published in the Condor.
Southwestern Willow Flycatcher monitoring and removal of Brown-headed Cowbirds for the South Fork Kern River Valley in 2005. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
2005
Assessing variation of plumage coloration within the Willow Flycatcher: a preliminary analysis. U.S. Geological Survey Report.
Parasitism, Productivity, and Population Growth: Response of Least Bell’s Vireos (EVireo bellii pusillusE) and Southwestern Willow Flycatchers (Empidonax traillii extimus) to Cowbird (Molothrus spp.) Control. Published in Ornthological Monographs.
Southwestern Willow Flycatcher Monitoring and Removal of Brown-headed Cowbirds on the South Fork Kern River in 2004. Report to the U.S. Army Corps of Engineers, Sacramento, CA
Winter distribution of the Willow Flycatcher (Empidonax traillii) in Ecuador and northern Mexico. Report to the Bureau of Reclamation, Boulder City, NV.
2004
Southwestern Willow Flycatcher Monitoring and Removal of Brown-headed Cowbirds on the South Fork Kern River in 2003. Report to the U.S. Army Corps of Engineers, Sacramento, CA
Winter distribution of the Willow Flycatcher (Empidonax traillii) in Ecuador and southern Mexico. Report to the Bureau of Reclamation, Boulder City, NV.
2003
Food habitats of the Southwestern Willow Flycatcher during the nesting season. Published in Studies in Avian Biology.
Recommendations for cowbird management in recovery efforts for the Southwestern Willow Flycatcher. Published in Studies in Avian Biology.
Southwestern Willow Flycatcher monitoring and removal of Brown-headed Cowbirds on the South Fork Kern River in 2002. Report to the U.S. Army Corps of Engineers, Sacramento, CA
Willow Flycatcher winter habitat in El Salvador, Costa Rica, and Panama: characteristics and threats. Published in Studies in Avian Biology.
Sogge, M.K., B.E. Kus, S.J. Sferra and M.J. Whitfield (editors). 2003. Ecology and Conservation of the Willow Flycatcher. Studies in Avian Biology No. 26.
Winter Distribution of the Willow Flycatcher (Empidonax traillii) in Ecuador and southern Mexico. Report to the Bureau of Reclamation, Boulder City, NV and to the U.S. Fish and Wildlife Service, Sacramento, CA.
2002
Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys, nest monitoring, and removal of Brown-headed Cowbirds on the South Fork Kern River in 2002. Report to the U.S. Army Corps of Engineers, Sacramento, CA
Winter Distribution of the Willow Flycatcher (Empidonax traillii) in Mexico. Report to the Bureau of Reclamation, Boulder City, NV and to the U.S. Fish and Wildlife Service, Sacramento, CA.
2001
Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys, nest monitoring, and removal of Brown-headed Cowbirds on the South Fork Kern River in 2001. Report to the U.S. Army Corps of Engineers, Sacramento, CA
Kern River Research Center Reports and Publications
2000
Association of cowbird parasitism and vegetative cover in territories of Southwestern Willow Flycatchers. The Ecology and Management of Cowbirds and their hosts. University of Texas Press, Austin, Texas.
Demography of the Southwestern Willow Flycatcher. General Technical Report to USDA, Forest Service Rocky Mountain Research Station, Ogden, UT.
Results of a Brown-headed Cowbird trapping program for the Southwestern Willow Flycatcher. The Ecology and Management of Cowbirds and their hosts. University of Texas Press, Austin, Texas.
Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys, nest monitoring, and removal of Brown-headed Cowbirds on the South Fork Kern River, California in 2000. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
The ecology of Brown-headed Cowbirds and their effects on Southwestern Willow Flycatchers. General Technical Report to USDA, Forest Service Rocky Mountain Research Station, Ogden, UT.
Winter distribution of the Willow Flycatcher (Empidonax traillii) in Panama and El Salvador. Report to U.S. Geological Survey and the U.S. Bureau of Reclamation, Boulder City, NV.
1999
Is Brown-headed Cowbird trapping effective for managing populations of the endangered Southwestern Willow Flycatcher? Published in Studies in Avian Biology.
Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys, nest monitoring, and removal of Brown-headed Cowbirds on the South Fork Kern River, California in 1999. Report to the U.S. Army Corps of Engineers, Sacramento, CA.
Surveys for wintering Willow Flycatchers (Empidonax traillii) in Costa Rica and Panama. Report to the Bureau of Reclamation, Phoenix, AZ.
Range-wide impact of Brown-headed Cowbird parasitism on the Southwestern Willow Flycatcher Published in Studies in Avian Biology.
