U.S. Fish and Wildlife Service (USFWS). 1991. Endangered and threatened wildlife and plants; animal notice of review. Federal Register 56(225):58804-58836. 50 CFR (17).

Dunmire, B. 1991. NMNHP element occurrence record filled out by B. Dunmire, NM TNC Field Office.

Lincoln National Forest. 1991. Northern Goshawk Field Forms & Maps.

Sisneros, J. et al (1991) Northern Goshawk Inventory Form - 1991. Tres Piedras Ranger District, Carson National Forest, USFS. 63 p.

DeBruin, E. et. al. 1991 Field survey to Lincoln NF - Matney Spring, 27 May 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #19, 25 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area - Kitten Canyon stop #14 on 10 May 1991.

Mongold, R. 1991. Field survey to Capitan Mts - Pancho Canyon & Torrez Canyon, 31 May 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #39 30 May, 1991.

Mehlhop, P. 1991. Davies Tank field map. Sept 11, 1991.

Armitage, K. B. 1991. Social and population dynamics of yellow-bellied marmots: results from long-term research. Annual Rev. Ecol. Syst. 22:379-407.

Forbes, S. H., and F. W. Allendorf. 1991a. Mitochondrial genotypes have no detectable effects on meristic traits in cutthroat trout hybrid swarms. Evolution 45:1350-1359.

Iverson, J. B. 1991b. Phylogenetic hypotheses for the evolution of modern kinosternine turtles. Herpetological Monographs 5:1-27.

Powell, A. N. 1991. Great Lakes piping plovers: recovery or extirpation? Endangered Species Update 8(9-10):1-4.

Shaffer, H. B., J. M. Clark, and F. Kraus. 1991. When molecules and morphology clash: a phylogenetic analysis of the North American ambystomatid salamanders (Caudata: Ambystomatidae). Systematic Zoology 40:284-303.

Zink, R. M., W. L. Rootes, and D. L. Dittman. 1991c. Mitochondrial DNA variation, population structure, and evolution of the common grackle (QUISCALUS QUISCALA). Condor 93:318-329.

Clayton, P. 1991. An assessment of the biological values of the Ball Ranch, New Mexico. Unpubl. report by New Mexico Natural Heritage Program for The Nature Conservancy, New Mexico Field Office, Santa Fe, NM. 7 p. + app.

Coody, C. J. 1991. An improved census technique of the northern bobwhite (COLINUS VIRGINIANUS) using recorded calls of the female. M. S. thesis, Univ. of Arkansas. 46 pp. [Issued also as Arkansas Cooperative Fish and Wildlife Research Unit Publication No.

Haug, E. A., and A. B. Didiuk. 1991. Updated status report on the burrowing owl ATHENE CUNICULARIA HYUGAEA in Canada. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 29 pp.

Silver, R.D. et al (1991) Unpublished letter to Manuel Lujan, Secretary of the Interior, Northern Goshawk listing petition. Retrieved from Regional Office. 58 p.

Buehler, D. A., et al. 1991b. Effects of human activity on bald eagle distribution on the northern Chesapeake Bay. J. Wildlife Management 55:282-290.

Evens, J. G., et al. 1991. Distribution, relative abundance and status of the California black rail in western North America. Condor 93:952-966.

Iverson, G. C., and M. R. Fuller. 1991. Area-occupied survey technique for nesting woodland raptors. Pages 118-124 in Proceedings of Midwest Raptor Management Symposium and Workshop 27 Feb - 1 Mar 1989, Chicago, Illinois. National Wildlife Federation Scie

Minckley, W. L., P. C. Marsh, J. E. Brooks, J. E. Johnson and B. L. Jensen. 1991b. Management toward recovery of the razorback sucker. Pages 303-357 in W. L. Minckley and J. E. Deacon, editors. Battle against extinction: native fish management in the Amer

Pylypec, B. 1991. Impacts of fire on bird populations in a fescue prairie. Can. Field-Nat. 105:346-349.

Wilson, B. S. 1991b. Latitudinal variation in activity season mortality rates of the lizard Uta stansburiana. Ecolog. Monogr. 61:393-414.

Paul, R. T. 1991. Status Report -- EGRETTA RUFESCENS (GMELIN) Reddish Egret. U. S. Fish and Wildlife Service, Houston, Texas.

Aguilera, E., R. L. Knight, and J. L. Cummings. 1991. An evaluation of two hazing methods for urban Canada geese. Wildl. Soc. Bull. 19:32-35.

Cully, J.F. JR. 1991. Response of raptors to reduction of a Gunnison's prairie dog population by plague.. American Midland Naturalist. 125:140-149.

Grimm, M. 1991. Northeast Wisconsin Yellow Rail survey. Passenger Pigeon 53(2):115-121.

Lehman, N., et al. 1991. Introgression of coyote mitochondrial DNA into sympatric North American gray wolf populations. Evolution 45:104-119.

Pfennig, D. W., A. Mabry, and D. Orange. 1991. Environmental causes of correlations between age and size at metamorphosis in Scaphiopus multiplicatus. Ecology 72:2240-2248.

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.

Hayssen, V. 1991. Dipodomys microps. Am. Soc. Mamm., Mammalian Species No. 389:1-9.

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.

U.S. Fish and Wildlife Service (USFWS). 1991. Endangered and threatened wildlife and plants; animal candidate review for listing as endangered or threatened species. Proposed Rule. Federal Register. 56(225):58804-36.

Lincoln National Forest. 1991. Mexican Spotted Owl inventory forms.