Forbes, S. H., and F. W. Allendorf. 1991b. Associations between mitochondrial and nuclear genotypes in cutthroat trout hybrid swarms. Evolution 45:1332-1349.

Johnson, N. K., and J. A. Marten. 1991. Evolutionary genetics of flycatchers. III. Variation in EMPIDONAX HAMMONDII (Aves: Typrannidae). Can. J. Zool. 69:232-238.

Murphy, E. C., A. M. Springer, and D. G. Roseneau. 1991. High annual variability in reproductive success of kittiwakes (Rissa tridactyla L.) at a colony in western Alaska. Journal of Animal Ecology 60:515-534.

Sakai, H. F., and B. R. Noon. 1991. Nest-site characteristics of Hammond's and Pacific-slope flycatchers in northwestern California. Condor 93:563-574.

Zink, R. K., and D. L. Dittman. 1991. Evolution of brown towhees: mitochondrial DNA evidence. Condor 93:98-105.

Apa, A. D., D. W. Uresk, and R. L. Linder. 1991. Impacts of black-tailed prairie dog rodenticides on nontarget passerines. Great Basin Nat. 51:301-309.

De Smet, K.D., and M.P. Conrad. 1991. Status, habitat requirements, and adaptations of Ferruginous Hawks in Manitoba. Pages 219-221 in G.L. Holroyd, G. Burns, and H.C. Smith, editors. Proceedings of the second endangered species and prairie conservation w

Hines, T. D., and R. M. Case. 1991. Diet, home range, movements and activity periods of swift fox in Nebraska. Prairie Naturalist 23:131-138.

Procter-Gray, E. 1991. Female-like plumage of subadult male American redstarts does not reduce aggression from other males. The Auk 108:872-9.

Strickland, D. 1991. Juvenile dispersal in gray jays: dominant brood member expels siblings from natal territory. Can. J. Zool. 69:2935-2945.

Goldsmith, F.B. 1991. Monitoring for Conservation and Ecology. Chapman and Hall, New York, New York, USA.

Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes: North America north of Mexico. Houghton Mifflin Company, Boston, Massachusetts. 432 pp.

Stuart, J. N. 1991. Cnemidophorus exsanguis. Cat. Am. Amph. Rept. 516.1-516.4.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #1 22 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Adobe Downs Ranch, stops #12, 13, 14, on 1 May 1991.

Persecetti, C. and J. Horton. 1991. USGS Capitan Peak 7.5' topo map with Astragalus kerrii from 23-31 May 1991 field survey to Capitan Mts for TNC.

Barker, D.G. 1991. An investigation of the natural history of the New Mexico ridgenose rattlesnake, Crotalus willardi obscurus. 100 p.

Flanagan, P. (1991) 1991 Mexican Spotted Owl Inventory Form. Questa Ranger District, Carson National Forest, USFS. 41 p.

Muldavin, E. 1991. Riparian and wetlands survey, Pecos National Historical Park. Natural Heritage New Mexico Publ. No. 91-GTR-26. Natural Heritage New Mexico, Universit of New Mexico, Albuquerque, NM. 31 p.

Locklear, J.H. 1991. The status of Asclepias uncialis green in eastern Co and NE New Mexico. Unpubl report to the Co Field Office of TNC. 55 p + photos + maps.

Sanchez, B. (1991) Formal Spotted Owl Monitoring, Management Territoty 0602007. Silver City Ranger District, Gila National Forest, USFS. 7 p.

DeBruin, E. 1991. Special plant survey form, New Mexico for Draba standleyi.

American Ornithologists' Union (AOU) . 1991. Thirty-eighth Supplement to the American Ornithologists' Union Check-list of North American Birds. Auk 108:750-754.

Borth, Robert J. and Thomas S. Barina, 1991. Observations of AMORPHA-feeding CATOCALA in Wisconsin. Journal of the Lepidopterists Society 45(4): 371-372.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #13 27 May, 1991.

Cronin, M. A. 1991a. Mitochondrial-DNA phylogeny of deer (Cervidae). J. Mamm. 72:533-566.

Gore, J. A. 1991. Distribution and abundance of nesting least terns and black skimmers in northwest Florida. Florida Field Naturalist 19(3):65-96.

Margules, C.R. and M.P. Austin. Eds. 1991. Nature conservation: cost effective biological surveys and data analysis. Csiro, Australia.

Hill, N. P. and J. M. Hagan, III. 1991. Population trends of some northeastern North American landbirds: a half century of data. Wilson Bulletin 103:165-182.

S91SIVTANMUS, Legacy reference. Physical copy not yet located.

Nordyke, K. A., and S. W. Buskirk. 1991. Southern red-backed vole, Clethrionomys gapperi, populations in relation to stand succession and old-growth character in the central Rocky Mountains. Can. Field-Nat. 105:330-334.

Page, G. W., et al. 1991. Distribution and abundance of the snowy plover on its western North American breeding grounds. J. Field Ornithology 62:245-255.

Steidl, R. J., and C. R. Griffin. 1991. Growth and brood reduction of mid-Atlantic coast ospreys. Auk 108:363-370.

Advanced Sciences, Inc. 1991. Threatened and endangered species survey at ABC Flip side, White Sands Missile Range. WSMR Environmental Services Report no. REC-EA-03-88, prepared under WSMR contract DAAD07-90-C-0018. 4 April, 1991. . 14 p.

Hurley, T. Schwarz, H.R. (1991) Northern Goshawk Inventory Form - 1991 . Sandia Ranger District, Cibola National Forest, USFS. 3 p.

Reichenbacher, F.W. 1991. Illustrated manual of rare cacti of the United States and Puerto Rico. Unpublished manuscript draft on Toumeya papyracantha [Pediocactus papyracanthus] for southwest. Field biologists, Univ. of AZ and USFWS. May 1991. 4 pp.

Turner, J. W., Jr., and J. F. Kirkpatrick. 1991. New developments in feral horse contraception and their potential application to wildlife. Wildl. Soc. Bull. 19:350-359.

Anderson, D.L. 1991-1995. Range activities log book. WSMR Environmental Services.

Gorresen, M. Schwarz, H.R. (1991) Northern Goshawk Inventory Form - 1991. Sandia Ranger District, Cibola National Forest, USFS. 4 p.

Malville, L. et al. 1991. Summary report of surveys for Mexican spotted owls (Strix occidentalis lucida) conducted in the San Juan resource area of the Bureau of Land Management in southwestern Colorado

Sivinski, R., and K. Lightfoot. 1991. NM rare plant occurrence record data sheet of 18 June 1991 for Erigeron acomanus. EMNRD, Santa Fe, NM.

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Indian Creek Canyon on 23 June 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #36 29 May, 1991.

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

Reed, S. and P. Ryder. 1991. Field survey to Capitan Mts - ridge E. of Ellis Canyon. 23 May 1991.

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

Reed, S.and P. Hyder. 1991. Field survey to Capitan Mts - Matney Spring. 24 May 1991.

Berkey, G. 1991. Yellow Rails: birds that go click in the night. North Dakota Outdoors, March 1991:8-9.

Connelly, J.W., W.L. Wakkinen, and A.D. Apa. 1991. Sage grouse use of nest sites in southeastern Idaho. Journal of Wildlife Management 55(3):521-524.

U.S. Fish and Wildlife Service (USFW). 1991. Endangered and threatened wildlife and plants; final rule to list the Alamosa springsnail and the Socorro springsnail as endangered. Federal Register 58 (189): 49646-49649. 30 September 1991.

Kennedy, P. K., et al. 1991. Genetic variability in natural populations of the gray wolf, Canis lupus. Canadian Journal of Zoology 69:1183-1188.

Mattson, D. J., B. M. Blanchard, and R. R. Knight. 1991a. Food habits of Yellowstone grizzly bears, 1977-1987. Canadian J. Zoology 69:1619-1629.

Rinne, J. N. 1991. Habitat use by spikedace, Meda fulgida (Pisces: Cyprinidae) in southwestern streams with reference to probable habitat competition by red shiner, Notropis lutrensis (Pisces: Cyprinidae). Southwestern Naturalist 36:7-13.

Spencer, C. N., B. R. McClelland, and J. A. Stanford. 1991. Shrimp stocking, salmon collapse, and eagle displacement. BioScience 41:14-21.

Dunmire, W.W. 1991. T&E and sensitive plant survey, Ladron Mountains ACEC, Socorro Resource Area. Prepared for the BLM by the Nature Conservancy, NM Field Office. February 1, 1991.

Jennings, R. et al. 1991. Unpub. field notes for April 8-11, 1991 trip to Alamosa Warm Springs, Beaverhead, Cooney Tanks, Gillette Tank, Reserve and Tularosa River. 6 pp.

Sivinski, R. 1991. New Mexico rare plant occurrence record data sheet for Hymenoxys brachyatis. NM Forestry Division, Santa Fe, NM. June 24, 1991.

Adkins, R. M., et al. 1991. Hybrid breakdown in Peromyscus leucopus and examination of the recombinational-breakdown model. J. Mamm. 72:535-541.

DeGraaf, R.M., V.E. Scott, R.H. Hamre, L. Ernst, and S.H. Anderson, 1991. Forest and Rangeland Birds of the United States: natural history and habitat use. Agriculture Handbook 688, USDA Forest Service. January 1991.

Byers, S. M., and J. R. Cary. 1991. Discrimination of mallard strains on the basis of morphology. J. Wildl. Manage. 55:580-586.