Pechmann, J.H.K., D.E. Scott, R.D. Semlitsch, J.P. Caldwell, L J. Vitt, and J.W. Gibbons. 1991. Declining amphibian populations: the problem of separating human impacts from natural fluctuations. Science 253:892-895.

Stromberg, J.C., D.T. Patten, and B.D. Richter. 1991. Flood flows and dynamics of Sonoran riparian forests. Rivers 2:221-235.

Anderson, D. L. 1991. Plant collection log sheet for ^&Oenothera organensis - log #23: along Ash Canyon. 13 June 1991.

Dunmire, W.W. 1991. An inventory of populations of threatened, endangered and sensitive plant species with observations on condition of these populations and recommendations for future management actions. T&E sensitive plant survey, Horse Mountain ACEC, S

Watson, J. W., M. G. Garrett, and R. G. Anthony. 1991. Foraging ecology of bald eagles in the Columbia River estuary. J. Wildlife Management 55:492-499.

New Mexico Dept of Game and Fish. 1991. NM fish specimen database. Unpub printout from NM Dept Game and Fish computerized fish database, listing Oncorhynchus gilae from various museums, dated 10 April 1991.

Unknown (1991) Mexican Spotted Owl Annual Inventory and Monitoring Report for the Lincoln National Forest, 1991. Lincoln Supervisor's Office, Lincoln National Forest, USFS. 22 p.

Smith, S. M. 1991. The black-capped chickadee: behavioral ecology and natural history. Cornell Univ. Press, Ithaca. xi + 362 pp.

Burns, B. (1991) 1991 Mexican Spotted Owl Inventory Form. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 30 p.

Jennings, R. 1991. Alamosa Warm Springs-microhabitats. Unpub. Rana chiricahuensis data from Randy Jennings. Biology Dept. UNM.

Quesenberry, L. 1991. Unpub. printout of Bureau Land Mgt. T & E plant database for Gilia formosa 2 Jan. 1991. 2 pp.

DeBruin, E. Sept. 1991. Special plant survey form for Scrophularia laevis.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #5 23 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area- Little Slane Canyon - stop #24 on 6 May 1991.

Mehlhop, P. 1991. Field survey to Mineral Creek on 27 June 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #42, 27 May, 1991.

Reed, S. 1991. Field survey to Capitan Mtd. - Raton Spring 31 May 1991.

Bjorklund, M. 1991. Evolution, phylogeny, sexual dimorphism and mating system in the grackles (QUISCALUS spp.: Icterinae). Evolution 45:608-621.

Conover, M. R. 1991. Herbivory by Canada geese: diet selction and effect on lawns. Ecological Applications 1(2):231-236.

Gavin, T. A., R. A. Howard, and B. May. 1991. Allozyme variation among breeding populations of red-winged blackbirds: the California conundrum. Auk 108:602-611.

Koprowski, J. L. 1991. Response of fox squirrels and gray squirrels to a late spring-early summer food shortage. Journal of Mammalogy 72:367-72.

Morkill, A. E., and S. H. Anderson. 1991. Effectiveness of marking powerlines to reduce sandhill crane collisions. Wildlife Society Bull. 19:442-449.

Steidl, R. J., C. R. Griffin, and L. J. Niles. 1991b. Contaminant levels of osprey eggs and prey reflect regional differences in reproductive success. J. Wildl. Manage. 55:601-608.

Medin, D.E., and W.P. Clary. 1991. Breeding bird populations in a grazed and ungrazed riparian habitat in Nevada. USDA Forest Service, Intermountain Research Station Research Paper INT-441. Ogden, UT.

Banci, V. 1991. Status report on the grizzly bear URSUS ARCTOS HORRIBILIS. Committee on the Status of Endangered Wildlife in Canada (COSEWIC). 171 pp.

Gutierrez, R.J., D.R. Olson, and M.E. Seamans. 1991. Demography of two Mexican Spotted Owl (Strix occidentalis lucida) populations in Arizona and New Mexico: Preliminary results, 1991. Submitted by Department of Wildlife, Humboldt State University, Arcat

Hallock, L. A. 1991. Habitat utilization, diet and behavior of the eastern massasauga (Sistrurus catenatus) in southern Michigan. Masters thesis, Michigan State University, East Lansing.

New Mexico Dept of Game and Fish. 1991. NM fish specimen database. Unpub printout from NM Dept Game and Fish computerized fish database listing Cyprinodon pecosensis and C. tularosa specimens from various museums, dated 10 April 1991.

Painter, C.W. et al. 1991. The continuation of studies of the natural history of the New Mexico ridgenose rattlesnake Crotalus willardi obscurus, Gray Ranch NM, Unpubl. report for N.M. Dept Game and Fish submitted 15 Oct 91. 6 pp.

Unknown (1991) Spotted Owl Data Base Information. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 58 p.

Phillips, A.M., and B.G. Phillips. 1991. Status report for Puccinellia parishii. U.S. Fish and Wildlife Service, Ecological Services, Phoenix, AZ.

Browning, M. R. 1991. Taxonomic comments on the dunlin CALIDRIS ALPINA from northern Alaska and eastern Siberia. Bull. British Ornithologists Club 111:140-145.

Dolbeer, R. A., et al. 1991. Efficacy of two gas cartridge formulations in killing woodchucks in burrows. Wildl. Soc. Bull. 19:200-204.

Herkert, J.R. 1991b. Study suggests increases in restored prairie fragments to conserve breeding bird communities. Restoration and Management Notes 9:107.

Lyman, R. L. 1991. Late Quaternary biogeography of the pygmy rabbit (BRACHYLAGUS IDAHOENSIS) in eastern Washington. J. Mamm. 72:110-117.

Pinkowski, B. 1991. Wood Thrush. Pages 356-7 in R. Brewer, G. A. McPeek, and R. J. Adams Jr. (editors). The atlas of breeding birds of Michigan. Michigan State University Press, East Lansing, Michigan.

Walker, J. M., R. M. Abuhteba, and J. E. Cordes. 1991. Morphological and experimental verification of hybridization between all-female Cnemidophorus laredoensis B and gonochoristic Cnemidophorus gularis (Squamata: Teiidae). Herpetologica 47:152-164.

Collins, C.T., K. Corey, J. Pike, and L.R. Hays. 1991. The status and management of the Least Bell's Vireo within the Prado Basin, California, 1986-1990. Final Rep. to Orange County Water District, Fountain Valley, CA.

Bickle, C. A., J. F. Kirkpatrick, and J. W. Turner, Jr. 1991. Contraception in striped skunks with Norplant implants. Wildl. Soc. Bull. 19:334-338.

U.S. Fish and Wildlife Service (USFWS). 1991. Request for information on the Arctic and American peregrine falcons. Federal Register 56(113):26969-26971.

Huff, M.H., and C.M. Raley. 1991. Regional patterns of diurnal breeding bird communities in Oregon and Washington. Pages 176-205 in L.F. Ruggiero, K.B. Aubry, A.B. Carey, and M.H. Huff, technical coordinators. Wildlife and Vegetation of unmanaged Douglas-

Li, Y., and J. R. Gold. 1991. Cytogenetic studies in North American minnows (Cyprinidae): XXII. Chromosomal nucleolar organizer regions in the genus Pimephales. Canadian Journal of Zoology 69:2826-2830.

Reeder, J.R. 1991. A new species of Panicum (Gramineae from Arizona. Phytologia 71(4): 300-303.

Szymczak, M. R., and E. A. Rexstad. 1991. Harvest distribution and survival of a gadwall population. J. Wildl. Manage. 55:592-600.

Page, L. M., and B. M. Burr. 1991. A field guide to freshwater fishes: North America north of Mexico. Houghton Mifflin Company, Boston, Massachusetts. 432 pp.

Rosenberg, K.V., R.D. Ohmart, W.C. Hunter, and B.W. Anderson. 1991. Birds of the Lower Colorado River valley. The University of Arizona Press, Tucson. 416 pp.

Schmidly, D. J. 1991. The bats of Texas. Texas A & M University Press, College Station, Texas. 188 pp.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #5 on 22 July 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #2A, 27 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area - Radio tower plot #12 on 3 May 1991.

Martin, K. 1991. Photographs of an Aplomado Falcon observed near RITA site, WSMR. 4 p.

Dunmire, W.W. 1991. T + E and sensitive plant survey Sawtooth ACEC Socorro Resource Area BLM. Unpublished report by TNC, NM Field Office. 9 p + maps.

Joyner-Griffith, M. A. 1991. Neonatal desert tortoise (GOPHERUS AGASSIZII) biology: analyses of morphology, evaporative water loss and nautral egg production followed by neonatal emergence in the central Mojave Desert. California State University, Domingu

Powell, A. N. 1991. Monitoring black tern populations in Minnesota in association with the USFWS Waterfowl Production Survey. unpublished report to Minnesota Department of Natural Resources Nongame Program.

Minckley, W. L. 1991. Professor of Zoology. Arizona State University, Tempe, AZ.

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

Clayton, P. 1991. Field survey to Ball Ranch - Stop #21 on 5 Aug 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.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #33 29 May, 1991.

Mehlhop, P. Field survey to Alamosa Warm Springs on June 28, 1991.