Southwestern Willow Flycatcher (Empidonax traillii extimus) surveys and nest monitoring in San Diego County, California, 2018
Data presented are results of surveys and monitoring in 2018 for Southwestern Willow Flycatcher (Empidonax traillii extimus) in San Diego County, California. Surveys were conducted at locations along Escondido Creek, Los Penasquitos Creek, San Diego River, Otay River, and the San Luis Rey River, and nest monitoring …