Resource Library

2022 Southwestern Willow Flycatcher

An ArcGIS Online (AGOL) page containing historical and predictive maps developed by James Hatten of the USGS for the southwestern willow flycatcher habitat across the southwestern United States. The model predicts the probabilities for suitable habitat for SWFL and can be used to guide restoration efforts.

Use the Habitat Viewer here: https://usgs.maps.arcgis.com/apps/webappviewer/index.html?id=b362c94bd7…

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Colorado Parks & Wildlife - Wildlife Species Profiles & Habitat Scorecards

The purpose of these profiles is to provide landowners and land managers with easy-to-use guidelines for understanding habitat needs of priority wetland-dependent wildlife.

Please note that these profiles are limited to birds found in Mesa & Delta Counties.

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Tamarisk biocontrol alters bird community composition in the absence of cottonwood and willow vegetation

Invasive species disturb ecosystems and threaten biodiversity. Invasive species management, such as biological control, can cause additional disturbances, so quantifying how native species respond to invasive control is important to inform best management practices. Mahoney et al. quantified southwestern bird communities in sites that varied in the amount of the non-native plant tamarisk (Tamarix spp.), before and after biological control efforts.

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Lessons Learned for Successful Watershed Partnerships in the Colorado River Basin

What are the key ingredients of successful collaborative partnerships? What worked well and what did not? If we had to do it all over again, what would we do differently? This document, based on interviews with stakeholders from 11 watershed partnerships in the Colorado River Basin, discusses the successes and challenges encountered from initial partnership formation to maintaining momentum over the years. It informs how RiversEdge West and other partners can continue contributing to the long-term success and viability of watershed partnerships.

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Renewing Our Rivers: Stream Corridor Restoration in Dryland Regions

Our rivers are in crisis and the need for river restoration has never been more urgent. Water security and biodiversity indices for all of the world’s major rivers have declined due to pollution, diversions, impoundments, fragmented flows, introduced and invasive species, and many other abuses. Developing successful restoration responses are essential. Renewing Our Rivers addresses this need head-on with examples of how to design and implement stream-corridor restoration projects.

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Field Guide for Managing Kochia

Plant guide from the USDA-Natural Resources Conservation Service on managing Kochia.

Casey, P.A. 2009. Plant guide for kochia (Kochia scoparia). USDA-Natural Resources Conservation Service, Kansas Plant Materials Center. Manhattan, KS.

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Low-Water Native Plants for Colorado Gardens - Western Slope: Below 7,000'

Many people have an interest in landscaping with native plants. The purpose of this booklet is to help people make the most successful choices, based on their location in Colorado.

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Bringing Birds Home

Bringing Birds Home is a manual that describes how to proactively improve riparian habitat for bird species in Mesa County, Colorado.

This guide was made possible by a grant from the Bird Conservancy of the Rockies and was produced by RiversEdge West, with help from the Grand Valley Audubon Society, Tucson Audubon Society, and Audubon Arizona.

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How to Tell the Difference Between Russian Olive and Silverleaf Buffaloberry

This 1-page handout describes the differences between invasive Russian olive and native silverleaf buffaloberry. Photos of distinctive characteristics are provided.

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Waterjet Stinger

This document describes how to use a stinger, a tool to plant dormant unrooted cuttings of willows, cottonwoods, dogwoods, and other species.

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Riparian Restoration Cost Calculator

This resource developed by RiversEdge West (formerly Tamarisk Coalition) allows users to estimate tamarisk and Russian olive removal and restoration costs based on existing site parameters.

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This guide describes techniques for harvesting, storing, and planting various types of plant materials, including dormant cottonwood pole cuttings, willow whip cuttings, and longstem products. This guide was prepared by RiversEdge West (formerly Tamarisk Coalition), based on input provided by Los Lunas Plant Materials Center.

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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

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—2023 Annual Report

Science Support for Recovery of Southwestern Willow Flycatcher (Empidonax traillii extimus) on Conserved Lands in San Diego County

Distribution, Abundance, and Breeding Activities of the Southwestern Willow Flycatcher at Marine Corps Base Camp Pendleton, California—2022 Annual Report

Distribution, Abundance, and Breeding Activities of Southwestern Willow Flycatchers (Empidonax traillii extimus) at Select Locations on the San Luis Rey River, San Diego County, California—2024 Data Summary

Distribution and Abundance of Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Upper San Luis Rey River, San Diego County, California—2023 Data Summary

Evolutionary potential mitigates extinction risk under climate change in the endangered southwestern willow flycatcher

The complexity of global anthropogenic change makes forecasting species responses and planning effective conservation actions challenging. Additionally, important components of a species’ adaptive capacity, such as evolutionary potential, are often not included in quantitative risk assessments due to lack of data. While genomic proxies for evolutionary potential in at-risk species are increasingly available, they have not yet been included in extinction risk assessments at a species-wide scale.

Evidence of honest signalling in a suboscine bird: Southwestern willow flycatcher song frequency is positively related to apparent reproductive success

Seedballs: An opportunity for low-cost, community-based riparian revegetation

John Leary, Restoration and GIS Coordinator, RiversEdge West

This guide, authored by RiversEdge West's, John Leary, explains how to make seedballs and how to plan seedball making and dispersal events. Seedball events are low-cost, engage with and educate community members and support restoration efforts with revegetation.

Biocontrol & Threatened and Endangered Species

Biocontrol & Threatened and Endangered Species Amanda Stahlke1*

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