Empidonax traillii extimus
Johnson, K., P. Mehlhop, C. Black, and K. Score. 1999. Reproductive failure of endangered Southwestern Willow Flycatchers on the Rio Grande, New Mexico. The Southwestern Naturalist. 44(2):226-231.
U.S. Army Corps of Engineers. 1999. Draft limited reevaluation report and supplemental environmental impact statement: Rio Grande floodway, San Acacia to Bosque del Apache Unit, Socorro County, New Mexico. 155 + app.
Turner, R. (1995) Willow Flycatcher Survey Form. Lincoln Supervisor's Office, Lincoln National Forest, USFS. 6 p.
Howe, Bill. 1995. Letter to Janice Richardson. cc Sandy Williams.
Leal, D.A. 1994. Letter to Pat Mehlhop regarding SW Willow flycatcher sighting in 1993 and 1992 by the NM Cooperative Fish and Wildlife Research Unit.
Williams, S.O. 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.
Salazar, R. and M. Parsaca. 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.
Salazar, R. AND S. Desgeorges. 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.
Salazar, R. AND S. Desgeorges. 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.
Carpenter, R.F. (1993) Unpublished Letters Regarding Will Flycatcher Surveys. Retrieved from Guadalupe Ranger District, Lincoln National Forest, USFS. 45 p.