Armbruster, M. J. 1990. Characterization of habitat used by whooping cranes during migration. U.S. Fish and Wildlife Service. Biology of Reproduction 90(4). 16 pp.

Painter, C. 1990. Map of Animas Peak that specifies Crotalus willardi obscurus sighting localities.

Hawkes, J.M. (1990) Unpublished Letter to Forest Supervisor, Lincoln, N.F. Subject: 1990 Annual Spotted Owl Report. Lincoln Supervisor's Office, Lincoln National Forest, USFS. 1 p.

Tims, P. July 25, 1990. Threatened, endangered and sensitive plants observation record. USFS, Lincoln NF.

Ballen, M. 1990. 1990 Mexican Spotted Owl Inventory Form

Orr, Mary V. 1990. Threatened, endangered and sensitive plants observation record for Lilium philadelphicum. US Forest Service

Wyoming Natural Diversity Database. No date. Unpublished data on file. Wyoming Natural Diversity Database, Laramie, WY.

Anderson, L.E., H.A. Crum, and W.R. Buck. 1990. List of the mosses of North America north of Mexico. The Bryologist 93(4):448-499.

Ellis, P. M., and J. D. Okill. 1990. Breeding ecology of the merlin FALCO COLUMBARIUS in Shetland. Bird Study 37:101-110.

Karp, C. A., and H. M. Tyus. 1990. Behavioral interactions between young Colorado squawfish and six fish species. Copeia 1990(1):25-34.

Perrigo, G., et al. 1990. Spring migration corridor of golden-winged warblers in Tamaulipas, Mexico. Am. Birds 44:28.

Swihart, R. K. 1990. Quebracho, thiram, and methiocarb reduce consumption of apple twigs by meadow voles. Wildl. Soc. Bull. 18:162-166.

Messmer, T.A. 1990. Influence of grazing treatments on nongame birds and vegetation structure in south central North Dakota. Ph.D. dissertation. North Dakota State University, Fargo, ND. 164 pp.

Williams, S.O. 1990. Cloverdale breeding bird survey. Conducted 87-06-10, 88-06-02, 89-06-18, 90-06-04. 5 pp.

Berger, J. 1990. Persistence of different-sized populations: an empirical assessment of rapid extinctions in bighorn sheep. Conservation Biology 4:91-98.

Crocker-Bedford, D. C. 1990. Goshawk reproduction and forest management. Wildl. Soc. Bull. 18:262-269.

Grimes, J. 1990. Pediomelum pentaphyllum. Memoirs of the New York Botanical Garden. 61:82-84.

Kantola, A. T., and S. R. Humphrey. 1990. Habitat use by Sherman's fox squirrel (SCIURUS NIGER SHERMANI) in Florida. J. Mamm. 71:411-419.

Moore, D. W., and L. L. Janecek. 1990. Genic relationships among North American MICROTUS (Mammalia: Rodentia). Ann. Carnegie Mus. 59:249-259.

Stangel, P. W., J. A. Rodgers, Jr., and A. L. Bryan. 1990. Genetic variation and population structure of the Florida wood stork. Auk 107:614-619.

Bednarz, J.C., T. Hayden and T. Fischer. 1990. The Raptor and Raven Community of Los Medanos Area in Southern New Mexico: A unique and Significant Resource. In Ecosystem Management Bulletin of the 15th annual Natural Areas Conference, No. 471. Albany,

Coker, D. R, and J. L. Confer. 1990. Brown-headed cowbird parasitism on golden-winged and blue-winged warblers. Wilson Bulletin 102:550-552.

Gawlik, D. E., and K. L. Bildstein. 1990. Reproductive success and nesting habitat of loggerhead shrikes in north-central South Carolina. Wilson Bull. 102:37-48.

Kerpez, T. A., and N. S. Smith. 1990b. Nest-site selection and nest-cavity characteristics of Gila woodpeckers and northern flickers. Condor 92:193-198.

Pashley, D. N., and R. B. Hamilton. 1990. Warblers of the West Indies. III. The Lesser Antilles. Caribbean J. Sci. 26:75-97.

Short, L. L., and J. F. M. Horne. 1990b. The ivory-billed woodpecker - the costs of specialization. Pages 93-8 in A. Carlson and G. Allen (editors). Conservation and Management of Woodpecker Populations. Swedish University of Agricultural Sciences, Depart

Welch, B. L., F. J. Wagstaff, and R. L. Williams. 1990. Sage grouse status and recovery plan for Strawberry Valley, Utah. U.S. Forest Serv. Res. Pap. INT-430. 10 pp.

Peterson, R.T. 1990b. A field guide to western birds. Houghton Mifflin Company, Boston.

Peterson, R. T. 1990b. A field guide to western birds. Third edition. Houghton Mifflin Co., Boston. 432 pp.

DeBruin, E. 1990. Field survey to the Organ Mts, Soledad and Beasley Canyons, May 7, 1990.

Muldavin, Esteban. 1990. Community field surveys to the Gray Ranch.

DeGeus, D. W. 1990. Productivity and habitat preferences of loggerhead shrikes inhabiting roadsides in a midwestern agroenvironment. Iowa State University, Ames, Iowa. MS thesis.

Beck, D. D. 1990. Ecology and behavior of the Gila monster in southwestern Utah. J. Herpetol. 24:54-68.

Barlow, Patricia. 1990. Inventory of endangered flora, Silent Attack Warning System Project, White Sands Missile Range, Socorro County, New Mexico. Prepared for Army Corps of Engineers, Albuquerque. March 1990. 14 pp.

Conway, D. K., and K. L. P. Benson. 1990. A range extension for nesting Botteri's sparrow, AIMOPHILA BOTTERII, in southern Texas. Southwest. Nat. 35:348-349.

Jennings, R. and N. Scott. 1990. Unpub. MSB database file on Rana yavapaiensis. UNM Biology Dept. Albuquerque, NM 87131. 10 pp.

James, P.C., G.A. Fox, and T.J. Ethier. 1990. Is the operational use of strychnine to control ground squirrels detrimental to burrowing owls? Journal of Raptor Research 24:120-123.

McCord, R. D., R. E. Strauss, and C. H. Lowe. 1990. Morphometric variation in Kinosternon turtles of the western United States and adjacent Mexico. J. Herpetol. 24:297-301.

Muldavin, E. 1990. Gray Ranch vegetation survey, 1990. New Mexico Natural Heritage Program

Ornat, A. L., and R. Greenberg. 1990. Sexual segregation by habitat in migratory warblers in Quintana Roo, Mexico. The Auk 107:539-43.

Taylor, J. P., and R. E. Kirby. 1990. Experimental dispersal of wintering snow and Ross' geese. Wildl. Soc. Bull. 18:312-319.

Burger, J., and M. Gochfeld. 1990. The black skimmer: the social dynamics of a colonial species. Columbia Univ. Press, New York. 416 pp.

Painter, C. 1990. Locality of Crotalus willardi obscurus in Peloncillo Mountains. Hand drawn from U.S.G.S. Guadalupe Canyon Ariz-NM and Apache AZ-NM quadrangle, 15 min series - 19 and attached xeroxed 15 min. topo map.

Hoffman, J. E. 1990. Status survey of seven land snails in the Mineral Hills and the Pinaleno Mountains, Arizona. Prepared for U.S. Fish and Wildlife Service, Phoenix, Arizona. Contract No. 20181-88-00973.

Tims, P. 1990. "Cirsium vinaceum." Threatened, Endangered, and Sensitive Plants Observation Record. USDA Forest Service, NM.

Ainley, D. G., and R. J. Boekelheide, editors. 1990. Seabirds of the Farallon Islands. Stanford University Press, Stanford, CA.

Barlow, P. 1990. Inventory of endangered flora, Naval Ordnance Missile Test Station, Sixteen Inch Gun and Beach Head Sites, White Sands Missile Range, Socorro and Sierra Counties, New Mexico.

Painter, C.W. 1990. Herpetofauna of New Mexico. Compiled for the New Mexico Department of Game and Fish.

Avise, J. C., W. S. Nelson, J. Arnold, R. K. Koehn, G. C. Williams and V. Thorsteinsson. 1990. The evolutionary genetic status of Icelandic eels. Evolution 44:1254-1262.

DeBruin, E. 1990. Field survey to Organ Mts, Long Canyon for Perityle Cernua Sept 5, 1990.

Betts, B. J. 1990. Geographic distribution and habitat preferences of Washington ground squirrels (Spermophilus washingtoni). Northwestern Naturalist 71:27-37.

Engstrom, R. T., G. S. Butcher, and J. D. Lowe. 1990. Population trends in the least tern (Sterna antillarum) from Maine to Virginia: 1975-1986. Pages 130-138 in J. R. Sauer and S. Droege, editors. Survey designs and statistical methods for the estimation

Kee, S. N. 1990. Old-growth mixed-coniferous red fir forest transition. Journal of Field Ornithology (Supplement) 61:56.

Petter, S.C., D.B. Miles, and M.M. White. 1990. Genetic evidence of mixed reproductive strategy in a monogamous bird. Condor 92:702-708.

Walter, H. S. 1990. Small viable population: the red-tailed hawk of Socorro Island. Conservation Biology 4:441-443.

Armistead, H. T. 1990. Notes on black rails on the Delmarva Peninsula, especially in Dorchester County. Unpublished report. Maryland. Maryland Department of Natural Resources, Annapolis, Maryland. 6 pp.

Brooks, J. E. 1990. Conservation Plan for the aquatic resources of Bitter Lake National Wildlife Refuge, New Mexico.

U.S. Fish and Wildlife Service (USFWS). 1990. Emergency rule to list the golden-cheeked warber as endangered. Federal Register 55(87):18844-5.

Mongold, R. 1990. Letter from Roger Mongold to Ellen De Bruin. Aug. 1990 and notes from discussion with Robin Fisher 91-02-28.

Williams, S.O. and D.J. Cleary. 1990. Bird survey - Guadalupe Canyon, HIdalgo Co., NM 4-5 June 1990.