Empidonax traillii extimus
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Schwarz, H. and D. Cleary. 1993. Willow flycatcher survey detection and nest site data forms developed by Partners in Flight to establish occurrence of Empidonax traillii extimus in NM. Summary added by S.O. Williams III, NM Dept Game and Fish.
Sandell, C. 1993. Willow flycatcher survey detection and nest site data forms developed by Partners in Flight to establish occurrence of Empidonax trailii extimus in NM, with summary done by S.O. Williams III, NM Dept Game and Fish.
Rustay, C. 1993. Personal communication to S.O. Williams III about SW Willow flycatcher sightings at Los Ojos.
Cleary, D. 1993. Phone conversation with N.M. Runyan at NM Natural Heritage Program regarding breeding locations of SW Willow flycatcher on Zuni Indian Reservation.
Black, J. and R. Meyer. 1993. Summary of bird sighting in summer with summary by S.O. Williams III, NM Dept Game and Fish.
Keller, D. 2017. Southwestern willow flycatcher surveys for the 2017-breeding season.
Andersen, E. and R. Steidl. 2017. Identifying key habitat features for managing breeding Southwestern Willow Flycatchers: Summary of 2017 effort and detections of willow flycatchers. The University of Arizona, School of Natural Resources and the Environme
D. Moore, Bureau of Reclamation. 2016. Survey forms, spreadsheets, and shapefiles of Southwestern Willow Flycatcher and Yellow-billled Cuckoo detections for 2016. U.S. Department of Interior, Bureau of Reclamation.