Bureau of Land Management (BLM). 1991. San Luis Resource Area Record of Decision and Approved Resource Management Plan. December. Unpublished Report. US Department of Interior, Bureau of Land Management, Denver, Colorado, USA.

Igl, L.D. 1991. The role of climate and mowing on Dickcissel (SPIZA AMERICANA) movements, distribution and abundance. M.S. thesis. Iowa State University, Ames, IA. 54 pp.

Sivinski, R., and K. Lightfoot. 1991. NM rare plant occurrence record data sheet of 15 August 1991 for Argemone pleiacantha ssp pinnatisecta. EMNRD, Santa Fe, NM.

Grooms, S., and D. Peterson. 1991. Bluebirds! NorthWord Press, Inc. 160 pp.

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

Sivinski, R. 1991. NM rare plant occurrence record data sheet of 1 May 1991 for Phacelia splendens. EMNRD, Santa Fe, NM.

Black, C. and J. Black. 1991. Field survey to Gray Ranch - Fitzpatricks - site #1 on 20-21 June 1991.

Painter, C.W. 1991. Letter to Patricia Mehlhop regarding Sceloporis scalaris location, 20 Dec 1991. 1p + map.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #9A, 27 May, 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - near stop #3 on 22 MAY 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #3 23 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area-Kutz ACEC area stop #16 on 9 May 1991.

Anderson, J. 1991. Survey maps for Mexican Spotted Owl in Cibola National Forest. 7 p.

Caire, W. 1991. A breeding population of the northern pygmy mouse, BAIOMYS TAYLORI, in southwestern Oklahoma. Southwest Nat. 36:364-365.

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.

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-

ECoPlan Inc. 1991? An analysis of wetlands and endangered plant species along the Chama River: and their responses to fluctuating water levels. Part of study of Chama Wild and Scenic River w/ USFS and other agencies.

Kirkeminde, M. 1991. Letter regarding recent visits to existing Allium gooddingii locations in the Gila National Forest dated 2 Jan 1992. 3 pp.

Skaggs, K. 1991. Personal communication to Ellen DeBruin Regarding Oenothera Organensis.

Aldrich, J. W., and F. C. James. 1991. Ecogeographic variation in the American robin. Auk 108:230-249.

Confer, J.L., K. Knapp, D. Coker, M. Armstrong, and J. Doherty. 1991. The rapidly changing distribution of the Golden-winged Warber (VERMIVORA CHRYSOPTERA) in central New York. Kingbird 41:5-10.

Grzybowski, J. A. 1991. A closer look: the black-capped vireo. Birding, August 1991, pp. 216-219.

Keast, A., and S. Saunders. 1991. Ecomorphology of the North American ruby-crowned (REGULUS CALENDULA) and golden-crowned (R. SATRAPA) kinglets. Auk 108:880-888.

Oldham, J.C. and H.M. Smith. 1991. The generic status of the smooth green snake, Opheodrys vernalis. Bull. Md. Herp. Soc. 27(4):201-215.

Scott, A. C., and M. Bekoff. 1991. Breeding behavior of evening grosbeaks. Condor 93:71-81.

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.

Knight, P. and A. Cully. 1991. A new species of Astragalus (Fabaceae) from southeastern New Mexico. Southwestern Nat. 36(2):198-200. June 1991.

Noss, R. F. 1991. Effects of edge and internal patchiness on avian habitat use in an old-growth Florida hammock. Natural Areas Journal 11:34-47.

Schmutz, J.K. 1991a. Population dynamics of Ferruginous Hawks in Alberta. Pages 212-214 in G.L. Holroyd, G. Burns, and H.C. Smith, editors. Proceedings of the second endangered species and prairie conservation workshop. Natural History Occasional Paper 15

Holmes, A.M., R.R. Tasker, Q. F. Hess, A.J. Hanks, 1991. The Ontario Butterfly Atlas. Toronto Entomologists Association, 167 pp.

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.

Altenbach, J. Scott. 1991. Untitled letter about "Lava Cave." Department of Biology, University of New Mexico. October 1991. 2 pp.

Mehlhop, P., et al. 1991. Status and distribution of Erigeron rhizomatus (Zuni Fleabane) within a designated satellite image reflectance value in the Datil and Sawtooth Mts. Unpubl. report by New Mexico Natural Heritage Program for Cibola National Forest.

Sivinski, R. 1991. Letter to Douglas F. Irving of Chapman, Wood, and Griswold, Inc. Concerning proposed mining impact on Townsendia gypsophila occurring in Sec. 16, T15NR1E.

Bildstein, K. L., P. C. Frederick, and M. G. Spalding. 1991. Feeding patterns and aggressive behavior in juvenile and adult American flamingos. Condor 93:916-925.

Clayton, P. 1991. Field Ssurvey to Ball Ranch - Stop #22 on 5 Aug 1991.

Cooch, E. G., D. B. Lank, R. F. Rockwell, and F. Cooke. 1991. Long-term decline in body size in a Snow Goose population: evidence of environmental degradation? Journal of Animal Ecology 60:483-496.

Fleming, T. H. 1991. Following the nectar trail. Bats 9(4):4-7.

Dennis, R. 1991. Ospreys. Colin Baxter Photography. 48 pp.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #3 on 22 April 1991.

Price, R. M. 1991. Senticolis, S. triaspis. Society for the Study of Amphibians and Reptiles 525.1-525.4.

Mongold, R. 1991. Field survey to Capitan Mts - Sawset Canyon, 31 May 1991.

Laudenslayer et al. 1991. California Fish and Game 77(3):109-141.[full citation not available]

Mayer, P. M., and M. R. Ryan. 1991a. Survival rates of artificial piping plover nests in American avocet colonies. Condor 93:753-755.

Rogers, L. L., G. A. Wilker, and S. S. Scott. 1991. Reactions of black bears to human menstrual odors. J. Wildlife Management 55:632-634.

Bravo-Hollis, H. y H. Sanchez-Mejorada. 1991. Las Cactaceas de MUniversidad Nacional Autonoma de MMVol. II Y III.

Kartesz, J. T. 1991. Accepted taxon names from 1991 checklist, as extracted by Larry Morse, TNC, June 1991.

Sivinski, R. 1991. Status report on Sophora gypsophila var. guadalupensis. NM Dept. of Energy, Minerals, and Natural Resources, Forestry Division.

Hotker, H. (ed.) 1991. Waders Breeding on Wet Grasslands. Wader Study Group Bull. 61, Supplement.

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.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #3 on 19 July 1991.