Amargosa Canyon Songbird Project 2021 Progress Report

Tamarix biological control in North America [Chapter 28]

Plant Community Response to Control of a Dominant Invader at Multiple Scales

Distribution and Abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Upper San Luis Rey River, San Diego County, California—2021 Data Summary

New locality for the tamarisk (Tamarix spp.) biological agent Diorhabda spp. in southeastern Arizona

Singing Behavior of Southwestern Willow Flycatchers in Arizona

Southwestern Willow Flycatcher (Empidonax traillii extimus) Surveys at the City of Carlsbad Preserve, San Diego County, California—2022 Data Summary

Researchers surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) at five survey areas within the City of Carlsbad Preserve, Carlsbad, California, in 2022. Three flycatcher surveys were completed between May 18 and June 29, 2022. Territorial or transient flycatchers were not observed at the City of Carlsbad Preserve in 2022.

Least Bell’s Vireo (Vireo bellii pusillus) and Southwestern Willow Flycatcher (Empidonax traillii extimus) Surveys in the Sepulveda Dam Basin, Los Angeles County, California—2022 Data Summary

Distribution, Abundance, and Breeding Activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2023 Annual Report

Distribution and Abundance of Least Bell’s Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) at the Mojave River Dam, San Bernardino County, California—2024 Data Summary