Shelton, P. C., and R. O. Peterson. 1983. Beaver, wolf and moose interactions in Isle Royale National Park, U.S.A. Acta Zool. Fenn. 174:265-266.

Zimmerman, J.L. 1983. Cowbird parasitism of Dickcissels in different habitats and at different nest densities. Wilson Bulletin 95:7-22.

Arnett, Jr., Ross H., ed. 1983. Checklist of the Beetles of North and Central America and the West Indies. Flora and Fauna Publications, Gainesville, Florida. 24 P. (Pertains to all subsequent fasicle updates as well).

van Zyll de Jong, C.G. 1983. Handbook of Canadian mammals. 1. Marsupials and insectivores. National Museum of Natural Sciences, National Museums of Canada, Ottawa, Canada. 210 pp.

Duggins, C. F., Jr., A. A. Karlin, and K. G. Relyea. 1983. Electrophoretic variation in the killifish genus Luciana. Copeia 1983:564-570.

Nussbaum, R.A., E.D. Brodie, Jr., and R.M. Storm. 1983. Amphibians and Reptiles of the Pacific Northwest. University Press of Idaho, Moscow, Idaho. 332 pp.

National Audubon Society. 1983. Eighty-third Christmas Bird Count. Audubon Field Notes 37:69-408.

Johnson, T.B. 1983. Status Report: Crotalus willardi willardi (Meek 1905). Unpubl. Report to Office of Endangered Species, USFWS.

Mendenhall, V. M., E. E. Klaas, and M. A. R. McLane. 1983. Breeding success of barn owls fed low levels of DDE and Dieldrin. Archives of Envirnonmental Contamination and Toxicology 12:235-40.

Stacey, P. B., R. D. Arrigo, T. C. Edwards, and N. Joste. 1983. Northwestern extension of the breeding range of the elf owl in New Mexico. Southwestern Naturalist 28:99-100.

Janzen, D.H. ed. 1983. Costa Rican natural history. Univ. Chicago Press, 816 pp.

Rowell, C.M., Jr. 1983. Status report [on Amsonia tharpii]. Report prepared for the U.S. Fish and Wildlife Service, Albuquerque, New Mexico.

Brown, D. E. 1983. On the status of the jaguar in the Southwest. Southwestern Naturalist 28:459-460.

Leonard, M. L., and M. B. Fenton. 1983. Habitat use by spotted bats (Euderma maculatum, Chiroptera: Vespertilionidae): roosting and foraging behavior. Can. J. Zool. 61:1487-1491.

Shirvell, C. S. and R. G. Dungey. 1983. Microhabitats chosen by brown trout for feeding and spawning in rivers. Trans. Am. Fish. Soc. 112(3): 355-367.

Ambuel, B., and S. A. Temple. 1983. Area-dependent changes in the bird communities and vegetation of southern Wisconsin forests. Ecology 64:1057-68.

Czaplewski, N.J. 1983. Idionycteris phyllotis. Mammalian Species 208:1-4.

Kress, S. W., E. H. Weinstein, and I. C. T. Nisbet. 1983. The status of tern populations in the northeastern United States and adjacent Canada. Colonial Waterbirds 6:84-106.

Telfair, R.C. II. 1983. The cattle egret: a Texas focus and world view. Texas Agricultural Experiment Station. (College Station).

Frost, D. R. 1983. Sonora semiannulata. Catalogue of American Amphibians and Reptiles 333.1-333.4.

Linden, H. and M. Wikman. 1983. Goshawk predation on tetraonids: availability of prey and diet of the predator in the breeding season. Journal of Animal Ecology 52:953-968.

Stevenson, H. M., et al. 1983. Notes on common and Antillean nighthawks of the Florida Keys. Auk 100:983-988.

Baker, R. H. 1983. Michigan mammals. Michigan State University Press. 642 pp.

Jones, J. K., Jr., D. M. Armstrong, R. S. Hoffmann, and C. Jones. 1983. Mammals of the Northern Great Plains. University of Nebraska Press, Lincoln, Nebraska.

Wilbur, S. R., and J. A. Jackson, eds. 1983. Vulture biology and management. Univ. California Press, Berkeley. xxii + 550 pp.

Dwyer, T. J., D. G. McAuley, and E. L. Derleth. 1983. Woodcock singing-ground counts and habitat changes in the northeastern United States. Journal of Wildlife Management 47:772-779.

American Ornithologists' Union (AOU). 1983. Check-list of North American Birds, 6th edition. Allen Press, Inc., Lawrence, Kansas. 877 p.

Akroyd, B. (1983) Unpublished letter to Bob Patterson. Subject: Survey of Waters in the Tres Piedras Area. Carson Supervisor's Office, Carson National Forest, USFS. 1 p.

Powell, A. M. 1983. Perityle (Asteraceae), New Species and Notes. Madrono, 30, No. 4: 217-225.

Colorado Division of Natural Resources (CDNR). 1983. Shrub thicket establishment in Colorado's high plains. Game information leaflet no. 108. 4 pp.

Williams, J. 1983. Canada Bonito CSA/COSAM Microplot Summary and Productivity. US Forest Service, 13 p.

Gray, G. G., and C. D. Simpson. 1983. Population characteristics of free-ranging Barbary sheep in Texas. J. Wildl. Manage. 47:954-962.

Stevens, T. P. 1983. Reproduction in an upper elevation population of Cnemidophorus inornatus (Reptilia, Teiidae). Southwest Nat. 28:9-20.

Fletcher, R.. 1983. Lincoln NF sensitive plant species trip report for May 16-20, 1983. . 3 p.

Kilham, L. 1983. Life history studies of woodpeckers of eastern North America. Nuttall Ornithol. Club Pub. No. 20. vii + 240 pp.

Rowell, C.M., Jr. 1983. Status report [on Lepidospartum burgessii]. Report prepared for the U.S. Fish and Wildlife Service, Albuquerque, New Mexico.

Brush, T. 1983. Cavity use by secondary cavity-nesting birds and response to manipulation. Condor 85:461-466.

Greene, G. E. 1983. Ectoparasites of the desert tortoise, Gopherus agassizii, with emphasis on the soft ticks of the genus Ornithodoros (Acari: Argasidae). Pp. 117-25 in Hashagen, K. A. and M. Trotter (eds.). Proceedings of the 1983 Symposium of the Deser

Minckley, W. L. 1983. Status of the razorback sucker, Xyrauchen texanus (Abbott), in the lower Colorado River basin. Southwestern Naturalist 28:165-187.

Sigler, W.F., W.T. Helm, P.A. Kucera, S. Vigg and G.W. Workman. 1983. Life history of the Lahonton cuttthroat trout, Salmo clarki henshawi, in Pyramid Lake, Nevada. Great Basin Naturalist 43(1):1-29.

Anderson, D. W., and F. Gress. 1983. Status of a northern population of California brown pelicans. Condor 85:79-88.

Davis, M. H. 1983. Post-release movements of introduced marten. J. Wildl. Manage. 47:59-66.

Langford, A. 1983. Pattern of nocturnal activity of male Dipodomys ordii (Heteromyidae). Southwest. Nat. 28:341-346.

Williams, S. O. 1983d. Distribution and migration of the black tern in Mexico. Condor 85:376-378.

Garrett, M. G. and W. L. Franklin. 1983. Diethylstilbestrol as a temporary chemosterilant to control black-tailed prairie dog populations. Journal of Range Management 36:753-6.

Linzey, D. W. 1983. Status and distribution of the northern water shrew (SOREX PALUSTRIS) and two subspecies of northern flying squirrel (GLAUCOMYS SABRINUS COLORATUS and GLAUCOMYS SABRINUS FUSCUS). U.S. Fish and Wildlife Service Contract No. 14-16-005-79

Strayer, D. 1983. The effects of surface geology and stream size on freshwater mussel (Bivalvia, Unionidae) distribution in southeastern Michigan, U.S.A. Freshwater Biology 13:253-264.

Cooper, E. L. 1983. Fishes of Pennsylvania and the northeastern United States. Pennsylvania State University Press, University Park. 243 pp.

Miller, J. E. 1983. Beavers. Prevention and control of wildlife damage. Cooperative Extension Service, Institute of Agricultural and Natural Resources, University of Nebraska, Lincoln.

Erickson, R. C., and J. W. Carpenter. 1983. Captive condor propagation and recommended release procedures. Pages 385- 399 in Wilbur, S. R., and J. A. Jackson, eds. Vulture biology and management. Univ. California Press, Berkeley.

Blake, J. G. 1983. Ecological relationships of breeding birds in isolated forest patches in east-central Illinois. University of Illinois. Unpublished Ph.D. dissertation.

Rappole, J. H., E. S. Morton, T. E. Lovejoy, and J. L. Ruos. 1983. Nearctic avian migrants in the neotropics. USDI Fish and Wildlife Service (USFWS) WR207. Washington, D.C. 646pp.

Graber, J. W., R. R. Graber, and E. L. Kirk. 1983. Illinois birds: wood warblers. Biological Notes 118. Illinois Natural History Survey, Champaign, Illinois.

Greeley, M. S., Jr., and R. MacGregor, III. 1983. Annual and semilunar reproductive cycles of the Gulf killifish, Fundulus grandis, on the Alabama Gulf Coast. Copeia 1983: 711-718.

Stromberg, M. R., R. L. Rayburn, and T. W. Clark. 1983. Black-footed ferret prey requirements: an energy balance estimate. J. Wildlife Management 47:67-73.

Fletcher, R. 1983. Lincoln National Forest trip report, September 26-27, 1983.

Sousa, P. and W. McDonal. 1983. Habitat Suitability Index Models: Baird's Sparrow. 18 p.

Buech, R. R. 1983. Modification of the Bailey live trap for beaver. Wildlife Society Bulletin 11:66-68.

Green, G.A., and M.L. Morrison. 1983. Nest-site selection of sympatric Ferruginous and Swainson's hawks. Murrelet 64:20-22.

Morrison, M. L., M. G. Raphael, and R. C. Heald. 1983. The use of high-cut stumps by cavity-nesting birds. Pp. 73-79 in J. W. Davis, G. A. Goodwin, and R. A. Ochenfels, technical coordinators. Snag habitat management, Proceedings of the symposium. USDA Fo