Southwestern Willow Flycatcher Documents

2025 Technical Report

2024 Middle Rio Grande Southwestern Willow Flycatcher Study Results Middle Rio Grande Project, New Mexico, Upper Colorado Basin Region; Technical Report No. ENV-2025-059

Bullard M., Prepared by Bureau of Reclamation, Technical Service Center, Denver, Colorado with funding by Bureau of Reclamation Albuquerque Area Office, Middle Rio Grande Conservancy District, and New Mexico Interstate Stream Commission

2025 Technical Report

2024 Southwestern Willow Flycatcher Survey Results – Belen Reach, Middle Rio Grande, New Mexico

Grbic J., Sanderson C., Prepared by RJH Consultants Inc., Englewood, CO and Tetra Tech Inc., Albuquerque, NM for Bureau of Reclamation, Albuquerque Area Office, NM.

2024 Technical Report

2023 Middle Rio Grande Southwestern Willow Flycatcher Study Results - Middle Rio Grande Project, New Mexico Upper Colorado Basin Region; Technical Report No. ENV-2024-018

Moore S.D., Prepared by Bureau of Reclamation, Technical Service Center, Denver, Colorado.

2023 Publication

Fantastic Birds and Where to Find Them. Dissertation. University of Nevada, Reno, Nevada

Phillips L., University of Nevada, Reno Dissertation

2023 Technical Report

Distribution and Abundance of Least Bell’s Vireos (Vireo bellii pusillus), Southwestern Willow Flycatchers (Empidonax traillii extimus), and Coastal California Gnatcatchers (Polioptila californica californica) at the Santa Fe Dam, Los Angeles County,

Lynn S., Kus B.E., U.S. Geological Survey Data Report 1171, 12 p.

2024 Technical Report

Distribution and Abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Upper San Luis Rey River, San Diego County, California—2022 data summary

Howell S.L., Kus B.E., U.S. Geological Survey Data Report 1194, 13 p.

2023 Technical Report

Least Bell's Vireos and Southwestern Willow Flycatchers at the San Luis Rey Flood Risk Management Project Area in San Diego County, California—Breeding Activities and Habitat Use—2022 Annual Report

Houston A., Allen L.D., Mendia S.M., Kus B.E., U.S. Geological Survey Open-File Report 2023–1040, 74 p.

2023 Journal Article

Evolutionary Potential Mitigates Extinction Risk Under Climate Change in the Endangered Southwestern Willow Flycatcher

Forester B.R., Day C.C., Ruegg K., Landguth E.L., Journal of Heredity, v. 114, p. 341-353

2023 Publication

Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys at the city of Carlsbad Preserve, San Diego County, California—2022 data summary

Allen L.D., Kus B.E., U.S. Geological Survey Data Report 1172, 9 p.

2021 Journal Article

Linking climate niches across seasons to assess population vulnerability in a migratory bird

Ruegg K., Anderson E.C., Somveille M., Bay R.A., Whitfield M., Paxton E.H., Smith T.B., Global Change Biology, v. 27, p. 3519-3531

2021 Journal Article

Subspecies discrimination based on song structure by Willow Flycatchers

Mahoney S.M., Pasch B., Theimer T.C., Journal of Field Ornithology, v. 92, p. 173-183

2022 Journal Article

Recovery of a native tree following removal of an invasive competitor with implications for endangered bird habitat

Goetz A., Moffit I. and Sher A.A.,, Biological Invasions, v. 24, p. 2769-2793

2020 Journal Article

Song but not plumage varies geographically among Willow Flycatcher (Empidonax traillii) subspecies

Mahoney S.M., Reudink M.W., Pasch B., Theimer T.C., Journal of Avian Biology, v. 51

2019 Journal Article

Effect of hydrologic, geomorphic, and vegetative conditions on avian communities in the Middle Rio Grande of New Mexico

Hamilton S.G., King S.L., Dello Russo G. et al., Wetlands, v. 39, p. 1029-1042

2018 Journal Article

Patch Age Since Disturbance Drives Patch Dynamics for Flycatchers Breeding in Both Reservoir and Riverine Habitat

Theimer T.C., Sogge M.K., Paxton E.H., Ecosphere, v. 9

2018 Journal Article

Extreme drought alters frequency and reproductive success of floaters in Willow Flycatchers

Theimer T.C., Sogge M.K., Cardinal S.N., Durst S.L., Paxton E.H., The Auk, v. 135, p. 647-656

2018 Journal Article

Using conspecific broadcast for Willow Flycatcher restoration

Schofield L.N., Loffland H.L., Siegel R.B., Stermer C., Mathewson H.A., Avian Conservation and Ecology, v. 13

2018 Journal Article

Ecological genomics predicts climate vulnerability in an endangered southwestern songbird

Ruegg K., Bay R.A., Anderson E.C., Saracco J.F., Harrigan R.J., Whitfield M., Paxton E.H., Smith T.B., Ecology Letters, v. 21, p. 1085-1096

2018 Journal Article

Using Prey Availability to Evaluate Lower Colorado River Riparian Restoration

Rubin Z., Rios‐Touma B., Kondolf G.M., Power M.E., Saffarinia P., Natali J., Restoration Ecology, v. 27

2018 Publication

Unintended consequences: Tamarisk control and increasing threats to the southwestern willow flycatcher

McLeod, M.A., In: Johnson, R. Roy; Carothers, Steven W.; Finch, Deborah M.; Kingsley, Kenneth J.; Stanley, John T., tech. eds. 2018. Riparian research and management: Past, present, future: Volume 1. Gen. Tech. Rep. RMRS-GTR-377. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 62-84

2018 Journal Article

A synoptic review of Tamarix biocontrol in North America: tracking success in the midst of controversy

Bean D., Dudley T., BioControl, v. 63, p. 361-376.

2018 Technical Report

Distribution and Abundance of Least Bell’s Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Middle San Luis Rey River, San Diego County, Southern California--2017 Data Summary

Allen L.D., Howell S.L., and Kus B.E., U.S. Geological Survey Data Series 1082

BOSQUE ECOSYSTEM MONITORING PROGRAM (BEMP) SITE MONITORING REPORT FOR 2023

04/29/2024, 2023 Final Report submitted to: US Army Corps of Engineers, USACE Contract #: W912PP18C0023 & US Bureau of Reclamation, Grant NO R21AP10166

2024 Annual Report

2023 Middle Rio Grande Endangered Species Collaborative Program Annual Report

MRGESCP, Prepared for Middle Rio Grande Endangered Species Act Collaborative Program, 20 p.

2024 Bibliography

Bibliography of Literature Published in 2023

MRGESCP, Middle Rio Grande Endangered Species Collaborative Program report.