Colwell, M.A. 1991. Effects of fluctuating wetland conditions on prairie shorebirds. Pages 173-180 in G.L. Holroyd, G. Burns, and H.C. Smith, editors. Proceedings of the second endangered species and prairie conservation workshop, Natural History Occasion

Lang, A. L. 1991b. Status of the American Coot, Fulica americana, in Canada. Canadian Field-Naturalist 105:530-541.

Olawsky, C. D. and L. M. Smith. 1991. Lesser prairie-chicken densities on tebuthiuron-treated and untreated sand shinnery oak rangelands. Journal of Range Management 44:364-368.

Shields, G. F., and T. D. Kocher. 1991. Phylogenetic relationships of North American ursids based on analysis of mitochondrial DNA. Evolution 45:218-221.

Beissinger, S. R., and N. F. R. Snyder, editors. 1991. New World parrots in crisis: solutions from conservation biology. Smithsonian Institution Press, Washington, D.C. 304 pp.

Thorp, J.H. and A.P. Covich (eds). 1991. Ecology and classification of North American freshwater invertebrates. Academic Press, Inc., Boston, MA. 911pp.

Brewer, R., G.A. McPeek, and R.J. Adams, Jr. 1991. The Atlas of Breeding Birds of Michigan. Michigan State University Press, East Lansing, Michigan. xvii + 594 pp.

New Mexico Department of Game and Fish. 1991 - Present. Biota Information System of New Mexico Database (bison-M). Arev version 2.8.

DeBruin, E. 1991. Field survey to Farmington Resource Area- Kitten Canyon plot #26 on 10 May 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop # 1A, 21 May, 1991

Wilson, D. S., H. R. Mushinsky, and E. D. McCoy. 1991a. Home range, activity, and use of burrows of juvenile gopher tortoises in central Florida. Pages 147-160 in R. B. Bury and D. J. Germano, editors. Biology of North American tortoises. National Biologi

Lightfoot, K. 1991. Field survey to Sacramento Mts. - Bates Ranch on 21 May 1991.

Cortez, F. Suazo, L. Medina, H. 1991. Rio Chiquito Stream Summary, Reach Number 1. Questa Ranger District, Carson National Forest. USFS

Jennings, R. 1991. Structure for i2. Unpub printout of invertebrate database assembled by R. Jennings at UNM Biology Dept.

Perlman, M. Walsh, J.. (1991) 1991 Mexican Spotted Owl Inventory Form. Tres Peidras Ranger District, Carson National Forest, USFS. 75 p.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #10 on 23 July 1991.

Blair, R. 1991. Loon conservation: acidified lakes & habitat selection. Center for Conservation Biology Update 5(2):6.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #30 29 May, 1991.

Cornelius, J.M., P.R. Kemp, J.A. Ludwig, and G.L. Cunningham. 1991. The distribution of vascular plant species and guilds in space and time along a desert gradient. Journal of Vegetation Science. 2:59-72.

Horton, J. and C. Persichetty. 1991. Field survey to Capitan Mts. - Pierce Canyon Arroyo at Forest Rd. 57, 23 May 1991.

Frazer, N. B., J. W. Gibbons, and J. L. Greene. 1991. Growth, survivorship and longevity of painted turtles Chrysemys picta in a southwestern Michigan marsh. Am. Midl. Nat. 125:245-258.

Hales, L. S., Jr. 1991. Occurrence of an introduced African cichlid, the blue tilapia, TILAPIA AUREA, in a tidal creek of the Skidaway River, Georgia. Brimleyana 17:27-35.

Lindeman, P. V. 1991. Survivorship of overwintering hatchling painted turtles, Chrysemys picta, in northern Idaho. Can. Field-Nat. 105:263-266.

Messier, F. 1991. The significance of limiting and regulating factors on the demography of moose and white-tailed deer. J. Animal Ecology 60:377-393.

Samuel, M. D., et al. 1991. Fall and winter distribution of Canada geese in the Mississippi flyway. J. Wildl. Manage. 55:449-456.

Anderson, D. L. 1991. Plant collection log sheet for ^&Oenothera organensis - log #23: along Ash Canyon. 13 June 1991.

Dunmire, W.W. 1991. An inventory of populations of threatened, endangered and sensitive plant species with observations on condition of these populations and recommendations for future management actions. T&E sensitive plant survey, Horse Mountain ACEC, S

New Mexico Dept of Game and Fish. 1991. NM fish specimen database. Unpub printout from NM Dept Game and Fish computerized fish database, listing Oncorhynchus gilae from various museums, dated 10 April 1991.

Unknown (1991) Mexican Spotted Owl Annual Inventory and Monitoring Report for the Lincoln National Forest, 1991. Lincoln Supervisor's Office, Lincoln National Forest, USFS. 22 p.

Kitchener, A. 1991. The natural history of the wild cats. Comstock Publishing Associates, Cornell Univ. Press, Ithaca. xxi + 280 pp.

Daly, L., S. Hoffman. 1991. Final Reports: Inventory for Northern Goshawk (Accipiter gentilis) in the Gila National Forest. Reserve District. June 27 to July 12, 1991. Prepared for U.S.F.S.

Kirkeminde, M. 1991. Unpub field notes for survey to Mogollon Mts - Indian Creek on 10 July 1991. 1 p + map.

Robertson, M.D. 1991. Winter ecology of migratory sage grouse and associated effects of prescribed fire in southeastern Idaho. M.S. Thesis, University of Idaho, Moscow. 88 pp.

DeBruin, E. Sept. 1991. Special plant survey form for Scrophularia laevis.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #5 23 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area- Little Slane Canyon - stop #24 on 6 May 1991.

Mehlhop, P. 1991. Field survey to Mineral Creek on 27 June 1991.

DeBruin, E. and S. Reed. 1991. Field survey to Tularosa Mts - Cox Canyon on 26 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #17 24 May, 1991

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

Horton, J. and C. Persichetty. 1991. Field survey to Capitan Mts. - Pierce Canyon Arroyo at Forest Rd. 57, 23 May 1991.

Afton, A. D., R. H. Hier, and S. L. Paulus. 1991. Lesser scaup diets during migration and winter in the Mississippi flyway. Can. J. Zool. 69:328-333.

Christiansen, J. L., and R. M. Bailey. 1991. The salamanders and frogs of Iowa. Iowa Department of Natural Resources, Nongame Technical Series (3):1-24.

Dolbeer, R. A. 1991. Migration patterns of Double-crested Cormorants east of the Rocky Mountains. Journal of Field Ornithology 62:83-93.

Howe, W.H. and F.L. Knopf. 1991. On the imminent decline of Rio Grande cottonwoods in cetnral New Mexico. South. Nat. 36:218-224.

The Nature Conservancy. 1991. Ball Ranch field map. USGS 7.5' topographic May - Hagan - 3510633.

Patterson, M. E., J. D. Fraser, and J. W. Roggenbuck. 1991. Factors affecting piping plover productivity on Assateague Island. J. Wildlife Management 55:525-531.

Medin, D.E., and W.P. Clary. 1991. Breeding bird populations in a grazed and ungrazed riparian habitat in Nevada. USDA Forest Service, Intermountain Research Station Research Paper INT-441. Ogden, UT.

Schulz, T.T., and W.C. Leininger. 1991. Nongame wildlife communities in grazed and ungrazed montane riparian sites. Great Basin Naturalist 51:286-292.

Wick, E. J., J. A. Hawkins, and T. P. Nesler. 1991. Occurrence of two endangered fishes in the Little Snake River, Colorado. Southwestern Naturalist 36:251-254.

Banci, V. 1991. Status report on the grizzly bear Ursus arctos horribilis. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 171 pp.

Gutierrez, R.J., D.R. Olson, and M.E. Seamans. 1991. Demography of two Mexican Spotted Owl (Strix occidentalis lucida) populations in Arizona and New Mexico: Preliminary results, 1991. Submitted by Department of Wildlife, Humboldt State University, Arcat

Hallock, L. A. 1991. Habitat utilization, diet and behavior of the eastern massasauga (Sistrurus catenatus) in southern Michigan. Masters thesis, Michigan State University, East Lansing.

New Mexico Dept of Game and Fish. 1991. NM fish specimen database. Unpub printout from NM Dept Game and Fish computerized fish database listing Cyprinodon pecosensis and C. tularosa specimens from various museums, dated 10 April 1991.

Painter, C.W. et al. 1991. The continuation of studies of the natural history of the New Mexico ridgenose rattlesnake Crotalus willardi obscurus, Gray Ranch NM, Unpubl. report for N.M. Dept Game and Fish submitted 15 Oct 91. 6 pp.

Unknown (1991) Spotted Owl Data Base Information. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 58 p.

Browning, M. R. 1991. Taxonomic comments on the dunlin CALIDRIS ALPINA from northern Alaska and eastern Siberia. Bull. British Ornithologists Club 111:140-145.

Dolbeer, R. A., et al. 1991. Efficacy of two gas cartridge formulations in killing woodchucks in burrows. Wildl. Soc. Bull. 19:200-204.

Herkert, J.R. 1991b. Study suggests increases in restored prairie fragments to conserve breeding bird communities. Restoration and Management Notes 9:107.

Lyman, R. L. 1991. Late Quaternary biogeography of the pygmy rabbit (Brachylagus idahoensis) in eastern Washington. J. Mamm. 72:110-117.