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Stinson, D. W., M. W. Ritter, and J. D. Reichel. 1991. The Mariana common moorhen: decline of an island endemic. Condor 93:38-43.

Gleason, H.A., and A. Cronquist. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. New York Botanical Garden, Bronx, New York. 910 pp.

McEneaney, T. 1991. The uncomon loon. Flagstaff, Northland. 112 pp.

Sheldon, J. W. 1991. Wild dogs: the natural history of the nondomestic Canidae. Academic Press. 248 pp.

DeBruin, E. 1991 Field survey to Lincoln NF - Capitan Peak Trailhead, 20 May 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Flora Vista, stop #6 on 2 May 1991.

New Mexico Natural Heritage Program. 1991. Field map for 1991 Gilia formosa survey on USGS 7 1/2' topo map, Blanco Quad.

Figg, D. E. 1991. Missouri Department of Conservation Annual Nongame and Endangered Species Report July 1990 - June 1991. ii + 35 pp.

Knapp, M. 1991.Unpublished letter to Camino Real District Ranger, Subject: Alamo Dinner Diversity Unit. USFS.

Sanchez, B. (1991) Formal Spotted Owl Monitoring, Management Territory 0602003, Summar of 1991 Monitoring. Silver City Ranger District, Gila National Forest, USFS. 5 p.

DeBruin, E. 1991. Field survey to Lincoln NF - Nogal Tank. 27 May 1991.

Allen, H. 1991. The great blue heron. NorthWord Press, Inc. 175 pp.

Bollinger, E.K. 1991. Conservation of grassland birds in agricultural areas. Pages 279-287 in D.J. Decker, M.E. Krasny, G.R. Goff, C.R. Smith, and D.W. Gross, editors. Challenges in the conservation of biological resources. Westview Press, Boulder, CO.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #38 30 May, 1991.

Glahn, J. F., et al. 1991. Impact of roost control on local urban and agricultural blackbird problems. Wildl. Soc. Bull. 19:511-522.

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Heusmann, H. W. 1991. The history and status of the mallard in the Atlantic Flyway. Wildl. Soc. Bull. 19:14-22.

S91SIVSBNMUS, Legacy reference. Physical copy not yet located.

Morrell, T. E., R. H. Yahner, and W. L. Harkness. 1991. Factors affecting detection of great horned owls by using broadcast vocalizations. Wildl. Soc. Bull. 19:481-488.

Shriner, W. M., and P. B. Stacey. 1991. Spatial relationships and dispersal patterns in the rock squirrel, SPERMOPHILUS VARIEGATUS. J. Mamm. 72:601-606.

Advanced Sciences, Inc. 1991. Final report: threatened and endangered species survey of areas to be affected by relocation of the Woodbridge EMP Simulator Facilities to WSMR. WSMR Environmental Services. 23 December 1991. . 33 p.

Harper, J. 1991. Mexican Spotted Owl Annual Report- FY 91. Jicarilla Ranger District, Carson National Forest, USFS. 4 p.

Poague, L. 1991. Monitoring Report for Hedghog Cactus. United States Forest Service (USFS) Regional Office, Albuquerque, NM. p.16.

Worthington, R.D. 1991. Rare plant survey of the Limestone Hills east of nations east well and west of Hueco Tanks State Historical Park, Fort Bliss Military Reservation, El Paso County, Texas. Unpubl. report by New Mexico Natural Heritage Program for Ft.

Thies, M. and W. Caire. 1991. Nearest neighbor analysis of the spatial distribution of houses of Neotoma micropus in southwestern Oklahoma. Southwest. Nat. 36(2): 233-237.

Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea, and W.B. Scott. 1991. Common and scientific names of fishes from the United States and Canada. American Fisheries Society, Special Publication 20. 183 pp.

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Gila National Forest. 1991. Threatened, Endangered and Sensitive Plant Program report on Allium gooddingii, Rumex orthoneurus and Senecio quarens.

Madrid, B. Arvedson, C. (1991) 1881 Mexican Spotted Owl Inventory Form. Silver City Ranger District, Gila National Forest, USFS. 2 p.

Sivinski, R. and K. Lightfoot. 1991. NM rare plant occurrence record data sheet of 28 June 1991 for Cypripedium pubescens. EMNRD, Santa Fe, NM.

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Indian Creek Canyon on 24 June 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #34 29 May, 1991.

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

Muldavin, E. 1991. Organ Mountains vegetation survey, 1991. New Mexico Natural Heritage Program

Perry, J. P. 1991. The Pines of Mexico and Central America. Timber Press.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #12 27 May, 1991.

Muldavin, E. 1991. Organ Mountains vegetation survey.

Belant, J. L., and R. K. Anderson. 1991. Common loon, GAVIA IMMER, brood habitat use in northern Wisconsin. Can. Field-Nat. 105:372-375.

Collins, J. T. 1991. Viewpoint: a new taxonomic arrangement for some North American amphibians and reptiles. SSAR Herpetol. Review 22:42-43.

Fuller, T. K. 1991. Effect of snow cover on wolf activity and prey selection in north central Minnesota. Canadian J. Zoology 69:283-287.

Johnson, A. S. 1991. Will lobo come home? Defenders 66(1):10-17.

Martin, K., and J. Parker. 1991. Mississippi kites reborn in Tennessee. The Tennesse Conservationist LVII(3):5-10.

Resetarits, W. J., Jr. 1991. Ecological interactions among predators in experimental stream communities. Ecology 72:1782-1793.

Smith, T. S., J. T. Flinders, and D. S. Winn. 1991. A habitat evaluation procedure for Rocky Mountain bighorn sheep in the Intermountain West. Great Basin Nat. 51:205-225.

Dunmire, W. 1991. Observation of threatened and endangered plants - survey report form of the Bureau of Land Management.

Hurley, T. Gorresen, M. (1991) Northern Goshawk Inventory Form - 1991 . Sandia Ranger District, Cibola National Forest, USFS.

Sivinski, R. and K. Lightfoot. 1991. NM Rare Plant Occurrence record data sheet of 10 July 1991 for Trifolium neurophyllum. EMNRD, Santa Fe.

Davidson, P. W. 1991. East Kootenay bighorn sheep enhancement project: completion report. British Columbia Ministry of Environment. Unpublished Wildlife Branch Report. Cranbrook, BC. 183pp.

Burgner, R. L. 1991. Life history of sockeye salmon (Oncorhynchus nerka). Pages 1-117 in C. Groot and L. Margolis, editors. Pacific salmon life histories. University of British Columbia Press, University of British Columbia, Vancouver. xv + 564 pp.

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.