Dixon, K. L. 1990. Constancy of margins of the hybrid zone in titmice of the PARUS BICOLOR complex in coastal Texas. Auk 107:184-188.

Jackson, D. D. 1990. Orangetooth is here to stay. Audubon, July 1990, pp. 89-94.

Patterson, M. E., J. D. Fraser and J. W. Roggenbuck. 1990. Piping plover ecology, management and research needs. Virginia Jour. Sci. 41(4A):419-26.

Swennen, C. 1990. Dispersal and migratory movements of eiders SOMATERIA MOLLISSIMA breeding in the Netherlands. Ornis Scand. 21:17-27.

New Mexico Department of Game and Fish Endangered Species Program. 1990. Checklist of the Native Reptiles of New Mexico.

Salas, D. Anderson, J. Romme, R. (1990) 1990 Annual Spotted Owl Report, Lincoln National Forest. Lincoln Supervisor's Office, Lincoln National Forest, USFS. 105 p.

Barrett, R. T., and W. Vader. 1990. The status and conservation of breeding seabirds in Norway. Pages 323-333 in Croxall et al., eds. Status and conservation of the world's seabirds. ICBP Tech. Pub. No. 2.

Blood, B. R. 1990. Taxonomy and distribution of Sigmodon in California. Bull. Southern California Acad. Sci. 89:86-93.

Eger, J. L. 1990. Patterns of geographic variation in the skull of Nearctic ermine (Mustela erminea). Can. J. Zool. 67:1241-1249.

Hoffman, R. A., and R. G. Wright. 1990. Fertility control in a non-native population of mountain goats. Northwest. Sci. 64:1-6.

Knorr, O. A., and M. S. Knorr. 1990. The black swift in the Chiricahua Mountains of Arizona. Southwest Nat. 35:559-560.

Platania, S. P. 1990. Reports and verified occurrence of logperches (Percina caprodes) and Percina macrolepida) in Colorado. Southwestern Naturalist 35:87-88.

Vives, S. P., and W. L. Minckley. 1990. Autumn spawning and other reproductive notes on loach minnow, a threatened cyprinid fish of the American southwest. Southwestern Naturalist 35:451-454.

Baltosser, W.H. and T.L. Best. 1990. Seasonal occurrence and habitat utilization by lizards in southwestern New Mexico. Southwest. Nat. 35(4):377-384.

Chamberlain-Auger, J. A., P. J. Auger, and E. G. Strauss. 1990. Breeding biology of American crows. Wilson Bull. 102:615-622.

Frazer, C., J. R. Longcore, and D. G. McAuley. 1990b. Home range and movements of postfledging American black ducks in eastern Maine. Can. J. Zool. 68:1288-1291.

Johnson, P. W. 1990. Black swift (CYPSELOIDES NIGER) nesting in the Jemez Mountains of New Mexico. New Mexico Ornithol. Soc. Bull. 18:13-15.

Noble, P. L. 1990. Distribution and density of owls at Monte Bello Open Space Preserve, Santa Clara County, California. Western Birds 21:11-16.

Schoen, J. W., and M. D. Kirchhoff. 1990. Seasonal habitat use by Sitka black-tailed deer on Admiralty Island, Alaska. J. Wildl. Manage. 54:371-378.

Watt, D. J., and A. M. Dimberio. 1990. Structure of successful nests of the American goldfinch (CARDUELIS TRISTIS). J. Field Ornithol. 61:413-418.

Collins, P. W., and S. B. George. 1990. Systematics and taxonomy of island and mainland populations of western harvest mice (Reithrodontomys megalotis) in southern California. Nat. Hist. Mus. Los Angeles County, Contr. in Sci. (420):1-26.

White, G. C., and R. A. Garrott. 1990. Analysis of wildlife radio-tracking data. Academic Press, San Diego, CA.

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

DeBruin, E. 1990. Field survey to Organ Mts, Ice Canyon, For Oenothera organensis and Phanerophlebia auriculata. Sept 4, 1990.

Curran, Norman L. 1990. Letter and Attached 1990 Monitoring Report for Cirsium vinaceum: Mayhill and Cloudcroft Ranger Districts, Lincoln National Forest. USDA Forest Service, NM.

Moore, D.W. et al. (1990) Genetic Variation Among Cutthroat Trout in the Southern Rocky Mountains. Retrieved from Regional Office, USFS. 39 p.

Church, K.E. and W.F. Porter. 1990. Winter and spring habitat use by gray partridge in New York. J. of Wildlife Management 54:653-657.

Hoffman, R. M. 1990. Birds of Wisconsin's deep marshes and shallow open-water communities. Passenger Pigeon 52(3): 259- 272.

LeGrand, H. 1990. Bewick's wren. In Lee, D. S. and J. F. Parnell (eds.). Endangered, threatened, and rare fauna of North Carolina. Part III. A re-evaluation of the birds. Occasional Papers of the NC Biological Survey: 1990-91.

Noon, B., and C. M. Biles. 1990. Mathematical demography of spotted owls in the Pacific Northwest. J. Wildl. Manage. 54:18-27.

Stahlecker, D. W., and J. J. Rawinski. 1990. First records for the boreal owl in New Mexico. Condor 92:517-519.

Johnson, T. B., et. al. 1990. Summary of literature on the Sonaran Desert population of the desert tortoise. Arizona Game and Fish Department, Nongame and Endangered Wildlife Program, Phoenix, AZ. 63 pp.

Castetter, R. 17 July 1990. Photographs of Perityle Cernua and habitat in Fillmore Canyon, Organ Mts.

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Barker, D.G. 1990. Variation, infraspecific relationships and biogeography of the Ridgenose Rattlesnake, Crotalus willardi. Biology of the Pitvipers. p. 89-105.

Kramer, C. (1990) Enviromental Assessment, McCrystal Creek Area. Carson Supervisor's Office, Carson National Forest, USFS. 23 p.

Wood, S. 1990. Monitoring report for Echinocereus fendleri var kuenzleri on Mayhill Ranger District, Lincoln National Forest.

New Mexico Department of Game and Fish. 1990. Checklist of the Amphibians of New Mexico.

Sullivan, R.M. and Richard A. Smartt. 1990. Survey of the Colorado chipmunk (Eutamias quadrivittatus), Oscura Mountain land snail (Oreohelix socorroensis), and other flora and fauna in the southern Oscura, Mockingbird, Fairview, and Sheep Mountains, White

Mehlhop, P. 1990. Field survey to Gray Ranch - S. Animas Valley and Playas Valley, McKinney flats. 2100-0200 hrs, 18 Sept. 1990.

Doroff, A. M., and L. B. Keith. 1990. Demography and ecology of an ornate box turtle (TERRAPENE ORNATA) population in south-central Wisconsin. Copeia 1990:387-399.

Janacek, L. L. 1990. Genic variation in the Peromyscus truei group (Rodentia: Cricetidae). J. Mamm. 71:301-308.

Peakall, D. B. 1990. Prospects for the peregrine falcon, FALCO PEREGRINUS, in the nineties. Canadian Field-Naturalist 104:168-173.

Swengel, S. R. 1990. How to find Saw-whet Owls. Bird Watcher's Digest 12:68-75.

Witmer, G., and T. A. O'Neil. 1990. Assessing cumulative impacts to wintering bald eagles in western Washington. Pages 144-150 in Mitchell et al., eds. Ecosystem management: rare species and significant habitats. New York State Museum Bull. 471.

Department of the Army, U.S. Army White Sands Missile Range, New Mexico. 1990. Addendum Life Cycle Environmental Assessment, XM135 Binary Chemical Warhead for the MLRS, Addendum 3. (Date-stamped) 22 February 1990.

Sansom, L. (1990) Sophora gypsophila var. guadalupensis Survey Report. Guadalupe Ranger District, Lincoln National Forest, USFS. 1 p.

Abarca, F. J. 1990. Graduate student. Arizona State University. Conversation with S. P. Vives. March 28, 1990.

Bollinger, E. K., P. B. Bollinger, and T. A. Gavin. 1990. Effects of hay-cropping on eastern populations of the bobolink. Wildl. Soc. Bull. 18:142-150.

Engler, J. 1990. Status of the trumpeter swan at Fish Springs National Wildlife Refuge. Utah Birds 6:1-12.

Holroyd, G. L., and U. Banasch. 1990. The reintroduction of the peregrine falcon, Falco peregrinus anatum, into southern Canada. Canadian Field-Naturalist 104:203-208.

Knopf, F.L., J.A. Sedgwick, and D.B. Inkley. 1990. Regional correspondence among shrubsteppe bird habitats. Condor 92:45-53.

Price, R. M. 1990. Bogertophis subocularis. Catalogue of American Amphibians and Reptiles 497.1-497.2.

Walker, J. M., et al. 1990. Hybridization between all-female Cnemidophorus tesselatus and gonochoristic Cnemidophorus sexlineatus. J. Herpetol. 24:388-396.

Manley, T. and M. Wood. 1990. The status of Columbian sharp-tailed grouse on the Tobacco Plain, Eureka, Montana. Final report. MDFWP, Kalispell. 25 pp.

Bechard, M. J., R. L. Knight, D. G. Smith, and R. E. Fitzner. 1990. Nest sites and habitats of sympatric hawks (BUTEO spp.) in Washington. J. Field Ornithol. 61:159-170.

Chester, D. N., et al. 1990. Habitat use by nonbreeding bald eagles in North Carolina. J. Wildlife Management 54:223-234.

U.S. Fish and Wildlife Service (USFWS). 22 May 1990. Proposal to determine the razorback sucker (Xyrauchen texanus) to be an endangered species. Federal Register 55(99):21154-21161.

Jones, M. T., and R. E. Mirarchi. 1990. Habitats used by common ground-doves in southern Alabama. Wilson Bull. 102:137-139.

Ortega, J. C. 1990a. Home-range size of adult rock squirrels (Spermophilus variegatus) in southeastern Arizona. J. Mamm. 71:171-176.