Thompson, C.W. 1991a. Is the painted bunting actually two species? Problems determining species limits between allopatric populations. Condor 93:987-1000.

Mayer, J. J. 1991. Wild pigs in the United States, their history, comparative morphology, and current status. Univ. Georgia Press. 336 pp.

Schwartz, A., and R. W. Henderson. 1991. Amphibians and Reptiles of the West Indies: Descriptions, Distributions, and Natural History. University of Florida Press, Gainesville, Florida. xvi + 720 pp.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #16 24 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-roadside pipeline site-stop #17 on 9 May 1991.

Giesen, K. M. 1991. Population inventory and habitat use by Lesser Prairie-Chickens in southeast Colorado. Federal Aid in Wildlife Restoration Report W-152-R, Colorado Division of Wildlife.

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.

Bazata, K. 1991. Nebraska stream classification study. Lincoln, Nebraska Department of Environmental Quality.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #16 on 30 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #2 23 May, 1991.

Burger, J., and M. Gochfeld. 1991. The common tern: its breeding biology and social behavior. Columbia Univ. Press, New York. 413 pp.

Brigham, R. M. 1991. Flexibility in foraging and roosting behaviour by the big brown bat (Eptesicus fuscus). Can. J. Zool. 69:117-121.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #2 on 22 April 1991.

Davis, J., R. H. MacDonald, and M. W. Sherman. 1991. Old-growth mixed coniferous-red fir forest transition. Journal of Field Ornithology (Supplement) 62:49-50.

Peterjohn, B.G., and D.L. Rice. 1991. Ohio breeding bird atlas. Ohio Department of Natural Resources, Division of Natural Areas and Preserves, Columbus, Ohio. 416 pp.

Mehlhop, P. 1991. Land snail field survey in New Mexico to Organ Mts, Soledad and North Canyons, Sept 9, 1991.

Iverson, J. B. 1991a. Life history and demography of the yellow mud turtle, Kinosternon flavescens. Herpetologica 47:373-395.

Loft, E. R., J. W. Menke, and J. G. Kie. 1991. Habitat shifts by mule deer: the influence of cattle grazing. J. Wildl. Manage. 55:16-26.

Pagels, J. F., M. L. Fies and R. Glascow. 1991. Appalachian water shrew, Sorex palustris punctulatus Hooper: recovery plan. Virginia Dept. of Game and Inland Fisheries. Richmond, VA.

Petit, L. J. 1991. Adaptive tolerance of cowbird parasitism by Prothonotary Warblers: a consequence of nest-site limitation? Animal Behavior 41:425-32.

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.

Wershler, C., W.W. Smith, and C. Wallis. 1991. Status of the Baird's Sparrow in Alberta: 1987/1988 update with notes on other grassland sparrows and Sprague's Pipit. Pages 87-89 in G.L. Holroyd, G. Burns, and H.C. Smith, editors. Proceedings of the second

Terres, J.K. 1991. The Audubon Society encyclopedia of North American birds. Alfred A. Knopf, New York.

Anderson, J. (1991) 1991 Mexican Spotted Owl Inventory Form. Sandia Ranger District, Cibola National Forest, USFS. 2 p.

Halterman, M. D. 1991. Distribution and habitat use of the yellow-billed cuckoo (Coccyzus americanus occidentalis) on the Sacramento River, California, 1987-1990. Masters thesis, California State University, Chico.

McCracken, J. D. 1991. Status report on the Louisiana waterthrush SEIURUS MOTACILLA in Canada. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 22 pp.

Stumpff, B. 1991. Memorandum, Department of Game and Fish. Subject: Fish Migration Barrier Surveys. USFS.

Nowak, R. M. 1999. Walker's mammals of the world. Sixth edition. Johns Hopkins University Press, Baltimore. Two volumes, 1,936 pp.

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

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #15 on 4 May 1991.

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

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #13 on 4 May 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area- Aztec S. city limits - stop #27 on 9 May 1991.

Bradford, D. F. 1991. Mass mortality and extinction in a high-elevation population of Rana muscosa. J. Herpetol. 25:174-177.

Conniff, R. 1991. Why catfish farmers want to throttle the crow of the sea. Smithsonian, July 1991, pp. 44-50, 52, 54-55.

Lanning, D. V., and M. A. Hitchcock. 1991. Breeding distribution and habitat of prairie falcons in northern Mexico. Condor 93:762-765.

Myers, L. 1991. Managing livestock to minimize impacts on riparian areas. Pages 24-30 in Riparian: what does it mean to me? (R. Roth, C. Bridges, and C. Zimmerman, editors). Third annual Colorado Riparian Association Conference, Pueblo, Colorado.

Taylor, H. L., and J. M. Walker. 1991. Morphological evidence for the conspecific relationship of the teiid lizards, Cnemidophorus tigris aethiops and C. tigris gracilis. Copeia 1991:800-809.

Fauna West Wildlife Consultants. 1991. A bibliography of literature and papers pertaining to swift and kit foxes. Montana Department of Fish, Wildlife and Parks.

Lincoln National Forest, Mayhill Ranger District. 1991. Echinocereus fendleri var kuenzleri monitoring report. May, 1991.

Skaggs, K.E. 1991. Distribution and habitat of Oenothera organensis and Perityle cernua, endemics of the Organ Mountains, New Mexico. 5p.+ attachments.

Anonymous. 1991. Diversity and dwarf mistletoe. BioScience 41:755.

Cummings, J. L., et al. 1991. Evaluation of dimethyl and methyl anthranilate as a Canada goose repellent on grass. Wildl. Soc. Bull. 19:184-190.

Haas, G. R., and J. D. McPhail. 1991. Systematics and distribution of the Dolly Varden (Salvelinus malma) and bull trout (Salvelinus confluentus) in North America. Canadian Journal of Fisheries and Aquatic Sciences 48:2191-2211.

Kirkpatrick, J. F., and J. W. Turner, Jr. 1991. Compensatory reproduction in feral horses. J. Wildl. Manage. 55:649-652.

Ortega, J. C. 1991. The annual cycles of activity and weight of rock squirrels (Spermophilus variegatus) in southeastern Arizona. Am. Midl. Nat. 126:159-171.

Scoppettone, G. G., and G. Vinyard. 1991. Life history and management of four endangered lacustrine suckers. Pages 359-377 in W. L. Minckley and J. E. Deacon (editors). Battle Against Extinction: Native Fish Management in the American West. University of

Garrott, R. A. 1991a. Feral horse fertility control: potential and limitations. Wildl. Soc. Bull. 19:52-58.

Iverson, J. B. 1991c. Patterns of survivorship in turtles (order Testudines). Canadian J. Zoology 69:385-391.

Lydeard, C., and M. C. Wooten. 1991. Occurrence of Gambusia affinis in the Savannah and Chattahoochee drainages: previously undescribed geographic contacts between G. affinis and G. holbrooki. Copeia 1991:1111-1116.

Tippie, D., J. E. Deacon, and C.-H. Ho. 1991. Effects of convict cichlids on growth and recruitment of White River springfish. Great Basin Naturalist 51:256-260.

McCabe, R. A. 1991. The little green bird: ecology of the willow flycatcher. Rusty Rock Press, Madison, Wisconsin. xv + 171 pp.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #18 on 2 Aug 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #17 24 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #5 on 24 April 1991.

Monson, G. 1991. Letter to W. Shifflett, USFWS, 24 June 1991.