Brush, T. 1991. Nesting ecology of Prothonotary Warblers in eastern Iowa: 1988-1991. Report submitted to the Iowa Department of Natural Resources. Unpublished.

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

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

Bryan, G.G., and L.B. Best. 1991. Bird abundance and species richness in grassed waterways in Iowa rowcrop fields. American Midland Naturalist 126:90-102.

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

DeGraaf, R. M., W. M. Healy, and R. T. Brooks. 1991. Effects of thinning and deer browsing on breeding birds in New England oak woodlands. Forest Ecology Management 41:179-191.

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.

Janvrin, J. A., E. P. Wiggers, and T. V. Dailey. 1991. Evaluation of drive counts for estimating northern bobwhite densities. Wildl. Soc. Bull. 19:XXX-481.

Worthington, R.D. (1991) Final Report, Kuenzler's Hedgehod Cactus Survey's 1, 2 & 3. Guadalupe Ranger District, Lincoln National Forest, USFS. 25 p.

Lundquist, R. W. and J. M. Mariani. 1991. Nesting habitat and abundance of snag-dependent birds in the southern Washington Cascade Range. Pp. 220-239 in L. F. Ruggiero, K. B. Aubry, A. B. Carey and M. H. Huff, tech. coordinators. Wildlife and Vegetation o

Postupalsky, S. 1991. Northern goshawk. Pages 169 in R. Brewer, G. A. McPeek, R. J. Adams Jr. (editors). Atlas of Breeding Birds of Michigan. Michigan State University Press, East Lansing, Michigan.

Britton, B. 1991. Unpublished plant occurrence record for Allium gooddingii at Gooseberry Canyon, Sept. 1988. map.

Kirkeminde, M. 1991. Unpub field notes for survey to Mogollon Mts - Hall Canyon on 31 July 1991. 1 p + map.

Skaggs, K. 1991. Plant/animal occurrence record - cooperator forms for Perityle cernua and Coryphantha organensis.

Williams, J. D., and G. H. Clemmer. 1991. Scaphirhynchus suttkusi, a new sturgeon (Pisces: Acipenseridae) from the Mobile Basin of Alabama and Mississippi. Bulletin of the Alabama Museum of Natural History 10:17-31.

Vermont Fish & Wildlife Department. 1991. Vermont's moose status 1991. 5 pp.

Anderson, J. (1991) 1991 Mexican Spotted Owl Inventory Form and Maps. Sandia Ranger District, Cibola National Forest, USFS. 40 p.

Harper, Hooley, Franklin, Martinez, Valdez. 1991. 1991 Mexican Spotted Owl Daytime Follow-up Visit Form, El Rito District, Carson National Forest, USFS. 3 p.

Turner, R., et al. 1991. NM Rare plant occurrence record data sheet of 27 August 1991 for Hedeoma apiculatum. EMNRD, Santa Fe, NM.

Gibbs, J. P., J. R. Longcore, D. G. McAuley, and J. K. Ringelman. 1991. Use of wetland habitats by selected nongame waterbirds in Maine. Fish and Wildlife Reservation 9, Fish and Wildlife Service.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #12 on 23 July 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Armenta Canyon, stop #4 on 7 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. 1991. Mexican Spotted Owl daytime follow-up visit form, survey for Mexican Spotted Owl.

Santa Fe National Forest. 1991. Mexican Spotted Owl daytime follow-up visit form, survey for Mexican Spotted Owl.

American Ornithologists' Union (AOU). 1991. Thirty-eighth supplement to the American Ornithologists' Union Check-list of North American birds. Auk 108:750-4.

Deacon, J. E., and C. D. Williams. 1991. Ash Meadows and the legacy of the Devils Hole pupfish. Pages 69-87 in W. L. Minckley and J. E. Deacon, eds. Battle against extinction: native fish management in the American West. University of Arizona Press, Tucso

Hammerson, G. A., and H. M. Smith. 1991. The correct spelling of the name of the short-horned lizard of North America. Bull. Maryland Herp. Soc. 27(3):121-127.

Klenner, W. 1991. Red squirrel population dynamics. II. Settlement patterns and response to removals. J. Anim. Ecol. 60:979-993.

Pashley, D. 1991. Shorebirds, gulls, and terns: Louisiana, Mississippi, Alabama. Pages 79-83. in Proceed. of the Coastal Nongame Workshop. Dawn Jenings (ed.) U.S. Fish and Wildl. Serv., Region 4, and Florida Game Fresh Water Fish Commission. Gainsville, F

Siegel-Causey, D., C. Lefevre, and A. B. Savinetskii. 1991. Historical diversity of cormorants and shags from Amchitka Island, Alaska. Condor 93:840-852.

Garrott, R. A., T. C. Eagle, and E. D. Plotka. 1991a. Age-specific reproduction in feral horses. Can. J. Zool. 69:738-743.

Jackson, G. D. 1991. Field identification of teal in North America: female-like plumages. Part I: blue-winged, cinnamon, and green-winged teal. Birding 23(3):124-133.

Mayer, P. M., and M. R. Ryan. 1991b. Electric fences reduce mammalian predation on piping plover nests and chicks. Wildlife Society Bull. 19:59-63.

Reichel, J. D., and P. O. Glass. 1991. Checklist of the birds of the Mariana Islands. Elepaio 50:3-11.

Tyus, H. M. 1991. Ecology and management of the Colorado squawfish. Pages 379-402 in W. L. Minckley and J. E. Deacon, editors. Battle against extinction: native fish management in the American West. Univ. Arizona Press, Tucson.

New, T. R. 1991. Butterfly Conservation. Oxford Univ. Press, Australia. 224 pp.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #17 on 2 Aug 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #31 29 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area-Blanco stop #5 on 8 May 1991.

Sherry, T. W., and R. T. Holmes. 1991. Population age structure of long-distance migratory passerine birds: variation in time and space. Acta XX Congressus Internationalis Ornithologici.

Anderson, J. (1991) 1991 Mexican Spotted Owl Inventory Form. Sandia Ranger District, Cibola National Forest, USFS. 8 p.

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

National Museum of Natural History, Smithsonian Institution. 1991. Mammals from New Mexico printout. 3 March 1991. 117 pp.

Skaggs, K. 1991. Plant/animal occurrence record - cooperator forms for Coryphantha organensis.

Rinne, J. L. and W. L. Minckley. 1991. Native fishes of arid lands: A dwindling resource of the desert southwest. U.S. Department of Agriculture, Forest Service, General Technical Report RM-206. Rocky Mountain Forest and Range Experiment Station, Fort Col

Clayton, P. 1991. Field survey to Ball Ranch - Stop #8 on 22 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #6 23 May, 1991.

Buehler, D. A., et al. 1991a. Differences in distribution of breeding, nonbreeding, and migrant bald eagles on the northern Chesapeake Bay. Condor 93:399-408.

DeBruin, E. 1991. Field survey to Farmington Resource Area-plot #19 on 7 May 1991.

Dickerman, R. W. 1991. On the validity of BUBO VIRGINIANUS OCCIDENTALIS Stone. Auk 108:964-965.