U.S. Geological Survey
Open-File Report 2007-1391
version 1.0

Southwestern Willow Flycatcher Breeding Site and Territory Summary – 2006

By Scott L. Durst, Mark K. Sogge, Shay D. Stump, Sartor O. Williams, Barbara E. Kus, and Susan J. Sferra

2007

Photo of small bird on a limb
Photo by S. Sferra

Introduction

The Southwestern Willow Flycatcher (Empidonax traillii extimus) is an endangered bird that breeds only in dense riparian habitats in six southwestern states (southern California, extreme southern Nevada, southern Utah, southwestern Colorado, Arizona, and New Mexico). Since 1993, hundreds of Southwestern Willow Flycatcher surveys have been conducted each year, and many new flycatcher breeding sites located. This document synthesizes information on all known Southwestern Willow Flycatcher breeding sites. This rangewide data synthesis was designed to meet these objectives:

identify all known Southwestern Willow Flycatcher breeding sites, and
assemble data on population size, location, habitat, and other information for all breeding sites, for as many years as possible, from 1993 through 2006.

This report provides data summaries in terms of the number of flycatcher sites and the number of territories.

Full Report

Download this report as a 31-page PDF file (of2007-1391.pdf; 1 MB)

Also of Interest

An extensive compilation of information on this topic is available at the Web site on Southwestern Willow Flycatcher Reports.

For questions about the content of this report, contact Scott Durst

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U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/of/2007/1391/
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Page Last Modified: December 18, 2007

U.S. Geological Survey Open-File Report 2007-1391 version 1.0