TY - RPRT TI - 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 AU - Scarlett L. Howell AU - Barbara E. Kus PY - 2025 DO - 10.3133/dr1212 UR - https://pubs.usgs.gov/publication/dr1212 ID - dr1212 ER -