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.

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.

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.

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

Stearns, S. C. 1983a. A natural experiment in life-history evolution: field data on the introduction of mosquito fish (Gambusia affinis) to Hawaii. Evolution 37:601-617.

Apfelbaum, S. I., and P. Seelbach. 1983. Nest tree, habitat selection and productivity of seven North American raptor species based on the Cornell University Nest Record Card Program. Raptor Research 17:97-113.

Dorogoi, I. V. 1983. Biological data on the Buff-breasted Sandpiper (Tryngites subruficollis). Bull. Mocow Soc. Nat. 88: 50-55. In Russian.

Liner, E.A. 1983. Tantilla wilcoxi. Cat. Am. Amph. Rep. 345.1-345.2

Wright, J. W., C. Spolsky, and W. M. Brown. 1983. The origin of the parthenogenetic lizard Cnemidophorus laredoensis inferred from mitochondrial DNA analysis. Herpetologica 39:410-416.

Casey, D. and D. Hein. 1983. Effects of heavy browsing on a bird community in deciduous forest. Journal of Wildlife Management 47:829-836.

Germano, D. J., R. Hungerford, and S. C. Martin. 1983. Responses of selected wildlife species to the removal of mesquite from desert grassland. Journal of Range Management 36:309-311.

Marr, T. G., and R. J. Raitt. 1983. Annual variations in pattern of reproduction of the cactus wren (CAMPYLORHYNCHUS BRUNNEICAPILLUS). Southwest. Nat. 28:149-156.

Van Horne, B. 1983. Density as a misleading indicator of habitat quality. Journal of Wildlife Management 47: 893-901.

DeGraaf, R. M., and D. D. Rudis. 1983a. Amphibians and reptiles of New England. Habitats and natural history. Univ. Massachusetts Press. vii + 83 pp.

Pfanmuller, L. A. 1983. Non Game Wildlife Research Supervisor. Minnesota Department of Natural Resources, St. Paul, Minnesota

Nielsen, L. A. and D. L. Johnson (eds.). 1983. Fisheries Techniques. American Fisheries Society, Bethesda, MD. 468 pp.

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.

Cade, T. J. and P. R. Dague. 1983. Elf Owls. The Peregrine Fund Newsletter, number 11. Cornell University Laboratory of Ornithology, Ithaca, New York.

Case, F. W. 1983. The genus Spiranthes in Michigan. The Michigan Botanist 22:79-92.

Gutierrez, R. J., R. M. Zink, and S. Y. Yang. 1983. Genic variation, systematic, and biogeographic relationships of some Galliform birds. Auk 100:33-47.

Morris, M. M. J., and R. E. Lemon. 1983. Characteristics of vegetation and topography near red-shouldered hawk nests in southwestern Quebec. J. Wildlife Manage. 47:138-145.

Stearns, S. C. 1983c. The evolution of life-history traits in mosquito fish since their introduction to Hawaii in 1905: rates of evolution, heritabilities, and developmental plasticity. American Zoologist 23:65-75.

Armstrong, E., and D. Euler. 1983. Habitat usage of two woodland BUTEO species in central Ontario. Can. Field-Nat. 97:200-207.

Ehrlich, P. R. 1983. Summer Butterflies in Dinosaur National Monument. Journal of the Lepidoperists' Society 37:91-92.

Mindell, D. P. 1983. Harlan's hawk (BUTEO JAMAICENSIS HARLANI): a valid subspecies. Auk 100:161-169.

Zappalorti, R. T., E. W. Johnson, and Z. Leszczynski. 1983. The ecology of the northern pine snake, Pituophis melanoleucus (Daudin) (Reptilia, Serpentes, Colubridae) in southern New Jersey, with special notes on habitat and nesting behavior. Bulletin of t