Clayton, P. 1991. Field survey to Ball Ranch - Stop #1 on 18 July 1991.

Aguero, D. A., R. J. Johnson, and K. M. Eskridge. 1991. Monofilament lines repel house sparrows from feeding sites. Wildl. Soc. Bull. 19:416-422.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #7 23 May, 1991.

Buhlmann, K. A., and M. R. Vaughan. 1991. Ecology of the turtle Pseudemys concinna in the New River, West Virginia. Journal of Herpetology 25:72-78.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #25 on 9 May 1991.

Dunbar, D. L., et al. 1991. Status of the spotted owl, STRIX OCCIDENTALIS, and barred owl, STRIX VARIA, in southwestern British Columbia. Canadian Field-Naturalist 106:464-468.

Smith, D.G. 1991. Keys to the Freshwater Macroinvertebrates of Massachusetts. D.G. Smith, Amherst, Massachusetts. 236 pp.

Kingsley, N.P., and T.H. Nicholls. 1991. Raptor habitat in the midwest. Pages 185-194 in Proc. midwest raptor management symposium and workshop. National Wildlife Federation, Washington, DC.

Marsh, P.C., M.E. Douglas, W.L. Minckley and R. Timmons. 1991. Rediscovery of Colorado squawfish, Ptychocheilus lucius (Cyprinidae), in Wyoming. Copeia 1991:1091-1092.

Propst, D. L., and K. R. Bestgen. 1991. Habitat and biology of the loach minnow, Tiaroga cobitis, in New Mexico. Copeia 1991:29-38.

Cadman, M. D. 1991. Updated status report on the Loggerhead Shrike (eastern population) LANIUS LUDOVICIANUS MIGRANS, in Canada. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 26 pp.

Mahrt, M. and J.R. Bacon. 1991. Inventory of listed species joint task force six operations Luna, Dona Ana, and Hidalgo counties, New Mexico. Unpub. report for U.S. Army Corp of Engineers, Albuquerque district and Joint Task Force Six, Fort Bliss, TX.

Southwestern Field Biologists. 1991. August 12, 1991 inventory of Mexican Spotted Owl ( Strix occidentalis lucida Nelson) in the Gila NF, Wilderness District.

Youngman, P. M., and F. W. Schueler. 1991. Martes nobilis is a synonym of Martes americana, not an extinct Pleistocene-Holocene species. J. Mamm. 72:567-577.

Cockrum, E. L., and Y. Petryszyn. 1991. The long-nosed bat, Leptonycteris: an endangered species in the southwest? Occas. Pap. Mus. Texas Tech Univ. (142):1-32.

Black, C. 1991. Bird observations on the Gray Ranch, Hidalgo Co., New Mexico. Compiled for the Nature Conservancy. 10 p.

Hevron, B. Oct 1 1991. Results of survey for: Erigeron acomanus, Proatriplex pleiantha and monitoring study of Astragalus humillimus on the Navajo Nation. Unpublished report for EMNRD by Navajo Natural Heritage Program.

Paton, P. W. C., and T. C. Edwards, Jr. 1991. Nesting ecology of the snowy plover at Great Salt Lake, Utah--1991 breeding season. Progress Report, Contract No. 90-2028, Utah Cooperative Fish and Wildlife Research Unit, Utah State University, Logan. 28 pp.

Weizling, R. 1991. Known site monitoring form for Ipomopsis sancti-spiritus. 6 p.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #11 on 23 July 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Kutz Canyon-stop #6A on 24 April 1991.

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Animas Peak NE - site #1 on 23 June 1991.

Reed, S. and P. Hyder 1991. USGS San Patricio 7.5' topo map with Mammillaria heyderii from 22 May 1991 field survey for TNC.

DeBruin, E. Sept 1991. Special plant survey form, NM for Coryphantha organensis in the Organ Mts.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Armenta Canyon, stop #1 on 24 April 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area - Hampton Arroyo ACEC plot #18 on 6 May 1991.

Gerhardt, R. P., M. A. Vasquez, and D. M. Gerhardt. 1991. Breeding biology, food habits, and siblicide of swallow-tailed kites. Pages 65-71 in Maya Project, Progress Report 4 (D. F. Whitacre, W. A. Burham, and J. P. Jenny, eds.). The Peregrine Fund, Boise

Bull, E. L. 1991. Summer roosts and roosting behavior of Vaux's Swifts in old-growth forests. Northwestern Naturalist 72:78-82.

Dawson, J. W., and R. W. Mannan. 1991b. The role of territoriality in the social organization of Harris' hawks. Auk 108:661-672.

Geist, V. 1991. Phantom subspecies: the wood bison BISON BISON "ATHABASCAE" Rhoades 1897 is not a valid taxon, but an ecotype. Arctic 44:283-300.

Leachman, B. and F. Knopf. 1991. Mountain plover gets attention. Fish and Wildlife News, June-July-August 1991, pp. 15, 22.

Newton, I., I. Wyllie, and A. Asher. 1991. Mortality causes in British barn owls TYTO ALBA, with a discussion of aldrin-dieldrin poisoning. Ibis 133:162-169.

Rotenberry, J. T., and J. A. Wiens. 1991. Weather and reproductive variation in shrubsteppe sparrows: a hierarchical analysis. Ecology 72:1325-1335.

Theberge, J. B. 1991. Ecological classification, status, and management of the gray wolf, Canis lupus, in Canada. Canadian Field-Naturalist 105:459-463.

Anderson, D.L. 1991. Plant collection log sheet for ^&Talinum longipes - log #41: Mockingbird Gap. 25 July 1991.

Fisher, R.E. 1991. Notes from phone conversation with Margaret Estabrook of the Reserve Ranger District, Gila National Forest on 7 Oct 1991.

Madrid, R. (1991) 1991 Mexican Spotted Owl Daytime Follow-up Visit Forms. Silver City Ranger District, Gila National Forest, USFS. 6 p.

Snow, P. Herrera, D. Miller, S. Ocana, P. 1991. 1990 Mexican Spotted Owl Inventory Form, El Rito Ranger District, Carson National Forest. USFS.

Unknown (1991) 1991 Humbolt Demographic Study Sighting. Retrieved from silver City Ranger Distict, Gila National Forest, USFS. 3 p.

Beier, P. 1991. Cougar attacks on humans in the United States and Canada. Wildl. Soc. Bull. 19:

Dennis, B., P. L. Munholland, and J. M. Scott. 1991. Estimation of growth and extinction parameters for endangered species. Ecological Monographs 61:115-143.

Hamer, D., S. Herrero, and K. Brady. 1991. Food and habitat used by grizzly bears, Ursus arctos, along the Continental Divide in Waterton Lakes National Park, Alberta. Canadian Field-Naturalist 105:325-329.

Kozie, K. D., and R. K. Anderson. 1991. Productivity, diet, and environmental contaminants in bald eagles nesting near the Wisconsin shoreline of Lake Superior. Arch. Environ. Contam. Toxicol. 20:41-48.

Pekins, P. J., F. G. Lindzey, and J. A. Gessaman. 1991. Physical characteristics of blue grouse winter use-trees and roost sites. Great Basin Nat. 51:244-248.

Smith, H. M., G. A. Hammerson, J. J. Roth, and D. Chizar. 1991. Distributional addenda for the smooth green snake (Opheodrys vernalis) in western Colorado, and the status of its subspecies. Bull. Maryland Herp. Soc. 27(2):99-106.

Avise, J. C., C. D. Ankney, and W. S. Nelson. 1991. Mitochondrial gene trees and the evolutionary relationship of mallard and black ducks. Evolution 44:1109-1119.

Burger, J., and R. T. Zappalorti. 1991. Nesting behavior of pine snakes (Pituophis m. melanoleucus) in the New Jersey Pine Barrens. J. Herpetol. 25:152-160.

Garrott, R. A. 1991b. Sex ratios and differential survival of feral horses. J. Anim. Ecol. 60:929-937.

Johnson, F. A., et al. 1991. Distribution, abundance, and habitat use by mottled ducks in Florida. J. Wildl. Manage. 55:476-482.

Nehlsen, W., J. E. Williams, and J. A. Lichatowich. 1991. Pacific salmon at the crossroads: stocks at risk from California, Oregon, Idaho, and Washington. Fisheries 16(2):4-21.

Rosen, P. C. 1991. Comparative ecology and life history of the racer (Coluber constrictor) in Michigan. Copeia 1991:897-909.

Walker, J. M., et al. 1991. Activity, temperature, age, size and reproduction in the parthenogenetic whiptail lizard Cnemidophorus dixoni in the Chinati Mountains in Trans-Pecos Texas. Am. Midl. Nat. 126:256-268.

Pianka, E. R. 1991. Phrynosoma platyrhinos. Catalog of American Amphibians and Reptiles 517: 1-4.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #13 on 23 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #41 28 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area- ACEC Area #13 on 25 April 1991.

Britton, B. 1991. Unpublished plant element occurrence record for Allium gooddingii in BS Canyon, Sept. 1988. + map.

Henry, A. 1991. Unpub. letter to Pat Mehlhop regarding Aplomado Falcon sightings on the Gray Ranch. February 15, 1991.

Painter, C.W. 1991. Letter from Charlie Painter, Endangered Species biologist for NM Dept. Game and Fish to Pat Mehlhop of NMNHP dated 4 Sept. 1991 regarding Sceloporus scalaris localities in Hidalgo Co. 1 pp.

Sullivan, R.M. 1991. Live trapping of potential habitat for the meadow jumping mouse (Zapus hudsonius luteus) at the San Jose drain outfall area. Preliminary environmental report submitted to the Marron/Taschek/Knight Corporation.