Type: report
Article abstract: We surveyed for Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) along the upper San Luis Rey River, near Lake Henshaw, in Santa Ysabel, California, in 2020. Surveys were completed at four locations: three downstream from Lake Henshaw, where nest monitoring occurred from 2015 to 2019 (Rey River Ranch [RRR], Cleveland National Forest [CNF], Vista Irrigation District [VID]), and one at VID Lake Henshaw (VLH) that was previously surveyed in 2018 and 2019.
Number of pages: 22
Authors: Howell, Scarlett L.; Kus, Barbara;
Year: 2020
Purpose: The goal of the 2020 effort was to assess the status of the flycatcher population along the upper San Luis Rey River in an area downstream from Lake Henshaw that was surveyed and monitored for nesting activity during 2015–19, as well as the habitat surrounding Lake Henshaw that was surveyed from 2018 to 19 (B.E. Kus, U.S. Geological Survey, unpub. data, 2020). This report is the annual update to surveys that have been completed since 2015 (B.E. Kus, U.S. Geological Survey, unpub. data, 2020)
Keywords: bird surveys; endangered species;
Species: Southwestern willow flycatcher
Projects: