Castrale, J. S. 1991. Eastern woodland buteos. Pages 50- 9 in Proceedings of Midwest Raptor Management Symposium and Workshop 27 Feb - 1 Mar 1989, Chicago, Illinois. National Wildlife Federation Scientific and Technical Series No. 15.

Dittmann, D. L., and R. M. Zink. 1991. Mitochondrial DNA variation among phalaropes and allies. Auk 108:771-779.

Holway, D. A. 1991. Nest-site selection and the importance of nest concealment in the black-throated blue warbler. Condor 93:575-581.

Lincoln National Forest. 1991. Maps of exclosures to protect Cirsium vinaceum, Lincoln NF, Alamagordo, NM.

Parren, S. G. 1991. Evaluation of nest-box sites selected by eastern bluebirds, tree swallows, and house wrens. Wildl. Soc. Bull. 19:270-277.

U.S. Fish and Wildlife Service (USFWS). 1991. Utah prairie dog recovery plan. Denver, CO. 41 pp.

Schmutz, J.K. 1991b. Age-related differences in reproductive success among Ferruginous and Swainson's hawks in Alberta. Journal of Raptor Research 25:160.

Wayne, R. K., et al. 1991. Conservation genetics of the endangered Isle Royale gray wolf. Conservation Biology 5(1)41-

Advanced Sciences, Inc. 1991. Threatened and endangered species survey at ATACMS NECI and FIX sites, final report. WSMR Environmental Services report no. EA-006-91, prepared under WSMR contract DAAD07-90-C-0018, Work Assignment Order 300-23. 11 October 19

Gila National Forest. 1991. Mexican Spotted Owl annual monitoring and inventory summary.

Bestgen, Kevin R. and Steven P. Platania. 1991. Status and conservation of the Rio Grande silvery minnow, ^&Hybognathus amarus. Southwest. Nat. 36(2): p225-232.

Diamond, A. W. 1991. Assessment of the risks from tropical deforestation to Canadian songbirds. Transactions of the North American Wildlife and Natural Resources Conference 56:177-194.

Herkert, J.R. 1991a. Prairie birds of Illinois: population response to two centuries of habitat change. Illinois Natural History Survey Bulletin 34:393-399.

Livezey, B. C. 1991. A phylogenetic analysis and classification of recent dabbling ducks (tribe Anatini) based on comparative morphology. Auk 108:471-507.

Peterson, M. J., W. E. Grant, and D. S. Davis. 1991. Bison-brucellosis management: simulation of alternative strategies. J. Wildl. Manage. 55:205-213.

Toland, B. 1991. Successful nesting by reddish egrets at Oslo Island, Indian River County, Florida. Florida Field Naturalist 19:51-53.

Todsen, T. 1991. Notes from telephone conversation between Tom Todsen and Ellen DeBruin concerning Limosella Pubiflora at Gray Ranch HQ Cienega on 12 Nov 1991.

Collins, C. T., W. A. Schew, and E. Burkett. 1991. Elegant terns breeding in Orange County, California. Am. Birds 45:393-395.

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.