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

Anderson, B. and M. Boyles. 1991. Plant/animal occurrence form for Allium gooddingii in 1988. 1 p.

Gustafson, M. E. 1991. Diet and habitat selection in Ohio nesting barn owls (TYTO ALBA). M.S. thesis, Ohio State Univ. ix + 92 pp.

Marron, et al. 1991. An unpublished survey on threatened and endangered plants including San Juan County [no title, incomplete document]. 52 pp.

Sivinski, R. 1991. NM rare plant occurrence record data sheet of 8 July 1991 for Mammillaria viridiflora 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.

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

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.

Blake, J.G. 1991. Nested subsets and the distribution of birds on isolated woodlots. Conservation Biology 5:58-66.

Conover, M. R., and G. S. Kania. 1991. Characteristics of feeding sites used by urban-suburban flocks of Canada geese in Connecticut. Wildl. Soc. Bull. 19:36-38.

Krementz, D. G., et al. 1991. Historical changes in laying date, clutch size, and nest success of American black ducks. J. Wildl. Manage. 55:462-466.

Morton, M.L. 1991. Postfledging dispersal of green-tailed towhees to a subalpine meadow. Condor 93:466-468.

Tango, P. J., E. D. Michael, and J. I. Cromer. 1991. Mating and first-season births in interstate transplanted river otters, LUTRA CANADENSIS (Carnivora: Mustelidae). Brimleyana 17:53-55.

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.

Texas Parks and Wildlife Dept., Resource Protection Division. 1991. Endangered resources annual status report. Texas Parks and Wildlife Department, Austin, TX, 45 pp + appendices.

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.

Budeau, D. A., J. T. Ratti, and C. R. Ely. 1991. Energy dynamics, foraging ecology, and behavior of prenesting greater white-fronted geese. J. Wildl. Manage. 55:556-563.

Gall, L.F. 1991a. Evolutionary ecology of sympatric Catocala moths (Lepidoptera: Noctuidae). I. Experiments on larval foodplant specificity. Journal of Research on the Lepidoptera. 29(3): 173-194.

Hull, C.N. 1991. Northern Waterthrush. Page 436 IN R. Brewer, G.A. McPeek, R.J. Adams, Jr. (editors), The atlas of breeding birds of Michigan. Michigan State University Press, East Lansing.

Lovich, J. E., et al. 1991. Relationships among turtles of the genus Clemmys (Reptilia, Testudines, Emydidae) as suggested by plastron scute morphology. Zoologica Scripta 20:425-429.

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.