TY  - RPRT
TI  - Distribution and abundance of Southwestern Willow Flycatchers ( Empidonax traillii extimus ) on the Upper San Luis Rey River, San Diego County, California—2023 data summary
AU  - Scarlett L. Howell
AU  - Barbara E. Kus
PY  - 2024
DO  - 10.3133/dr1194
UR  - https://pubs.usgs.gov/publication/dr1194
ID  - dr1194
ER  -