Empidonax traillii extimus
Williams, S.O. 1999. Letter to P. Mehlhop with attached summary of Willow Flycatcher surveys in NM during 1993-1998 with maps of each site. 21 p.
Stoleson, S. and D. Finch. 1999. Reproductive success of southwestern willow flycatchers in the Cliff-Gila Valley, New Mexico: a summary report for the 1998 field season. 25 p.
Johnson, K. 1999. Email exchange between K. Johnson and S.O. Williams with regard to cutting of willow patch used by a Southwestern Willow Flycatcher pair. 1 p.
Ahlers, D. and L. White. 1999. 1998 Southwestern Willow Flycatcher study results. Selected sites along the Rio Grande from Velarde, New Mexico, to the headwaters of Elephant Butte Reservoir. Unpubl. report by Bureau of Reclamation, Denver, CO. 72 p. +
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 Unpublished report, USDA Bureau of Reclamation. 38 p.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.