Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys and nest monitoring in San Diego County, California, 2017
Data presented are results of surveys and monitoring in 2017 for Southwestern Willow Flycatcher (Empidonax traillii extimus) in San Diego County, California. Surveys were conducted at locations along the San Luis Rey, Sweetwater, and Tijuana Rivers, and nest monitoring was performed at three locations along the San …