Empidonax traillii extimus
West, S. (1998) Willow Flycatcher Survey and Detection Form (rev. 4/97). Lincoln Supervisor's Office, Lincoln National Forest, USFS. 20 p.
Stoleson, S.H., D.M. Finch, and H.A. Walker. 1998. Surveys for Southwestern Willow Flycatchers along the Gila and Mimbres Rivers, New Mexico: Final report. USDA Forest Service, Rocky Mountain Research Station. 18 p. + app.
Finch, D., M. Means, L. Delay, and J. Kelly. 1998. Use of willow and adjacent habitats along the low flow conveyance channel by Willow Flycatchers and other migratory landbirds. Unpubl. report from the Rocky Mountain Research Station. 15 p. + app.
Ahlers, D. and L. White. 1998. 1997 Southwestern willow flycatcher study results: selected sites along the Rio Grande from Velarde, NM, to the headwaters of Elephant Butte Reservoir. Unpublished report, USDA Bureau of Reclamation. 38 p.
Egbert, J. 1981. Field inventories in New Mexico of selected Gila Valley birds. May-June 1981.
Skaggs, R. 1995. Population size, breeding biology and habitat of Willow flycatchers in the Cliff-Gila Valley. Final report prepared for NM Dept. Game & Fish.
Kowalski, R. (1995) Willow Flycatcher Survey Form. Lincoln Supervisor's Office, Lincoln National Forest, USFS 6 p.
Gaines, K.H. and N. Runyan. 1995. Specimen tag information from the Museum of Southwestern Biology bird collection, University of New Mexico, Albuquerque. July 1995.
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.