Clark, R. G., and P. J. Weatherhead. 1987. Influence of population size on habitat use by territorial male red-winged blackbirds in agricultural landscapes. Auk 104: 311-315.

Fuller, T. K., and J. A. Markl. 1987. Beaver, Castor canadensis, colony density in the Bearville Study Area, northcentral Minnesota. Canadian Field-Nat. 101:597-598.h

Laymon, S. A., and M. D. Halterman. 1987b. Can the western subspecies of Yellow-billed Cuckoo be saved from extinction? Western Birds 18:19-25.

Reynolds, R.T., and B.D. Linkhart. 1987a. Fidelity to territory and mate in flammulated owls. Pages 234-238 in R.W. Nero, R.J. Clark, R.J. Knapton, and R.H. Hamre, editors. Biology and conservation of northern forest owls. USDA Forest Service, Gen. Tech.

Wierenga, P.J., J.M.H. Hendrickx, M.H. Nash, J. Ludwig, and L.A. Daugherty. 1987. Variation of soil and vegetation with distance along a transect in the Chihuahuan Desert. Journal of Arid Environments. 13:53-63.

Graber, J. W., R. R. Graber, and E. L. Kirk. 1987. Illinois birds: Corvidae. Illinois Nat. Hist. Surv. Biol. Notes No. 126.

Cooper, E. L., ed. Carp in North America. Am. Fisheries Soc., Bethesda, Maryland. 84 pp.

Ahlquist, J. E., et al. 1987. Divergence of the single-copy DNA sequences of the western grebe (AECHMOPHORUS OCCIDENTALIS) and Clark's grebe (A. CLARKII), as indicated by DNA-DNA hybridization. Postilla No. 200.

Cincotta, R. P., D. W. Uresk, and R. M. Hansen. 1987. Demography of black-tailed prairie dog populations reoccupy-ing site treated with rodenticide. Great Basin Nat. 47:339-343.

Huntly, N., and R. S. Inouye. 1987. Small mammal populations of an old-field chronosequence: successional patterns and associations with vegetation. Journal of Mammalogy 68:739-745.

Millsap, B. A., and P. A. Millsap. 1987. Burrow nesting by common barn-owls in north central Colorado. Condor 89:668-70.

U.S. Fish and Wildlife Service (USFWS). 6 July 1987. Proposed determination of endangered status for two long-nosed bats. Federal Register 52:25271-25275.

BLM. 1987. Pasture map of Fort Stanton, composite from 7.5' topos of area with locations of Kuenzler hedgehog cactus from 1987 BLM survey.

Santa Fe National Forest. 1987. Environmental Impact Statement, Santa Fe National Forest, Santa Fe Watershed Research Natural Area. US Forest Service, 3 p.

Swift, B. L. 1987. An analysis of avian breeding habitats in Hudson river tidal marshes. New York State Department of Environmental Conservation, Division of Fish and Wildlife, Delmar, New York. Unpublished report. 62 pp.

Dunmire, W. and M. Toll. 1987. Establishment Record for Upper McKittrick Research Natural Area, Lincoln National Forest. US Forest Service, 127 p.

Weber, W.A. 1987. Colorado flora: Western slope. Colorado Associated University Press. Boulder. 530 pp.

Jennings, R.D. 1987. The status of Rana berlandieri, the Rio Grande leopard frog, and Rana yavapaiensis, the lowland leopard frog, in New Mexico. Report to Share With Wildlife, New Mexico Department of Game and Fish, Santa Fe. 52p.

Sakai, H. F. 1987. Response of Hammond's and western flycatchers to different-aged Douglas-fir stands in northwestern California. Master's thesis, Humboldt State University, Arcata, CA.

Merritt, J. F. 1987. Guide to the mammals of Pennsylvania. University of Pittsburgh, Pittsburgh, PA.

Carlson, D. C. and E. M. White. 1987. Effects of prairie dogs on mound soils. Soil Sci. Soc. Am. J. 51:389-3.

Gwynn, J. V. 1987. Wildlife disease investigation. Pages 98-106 in Virginia Wildlife Investigations. Virginia Department of Game and Inland Fish., Richmond, Virginia.

Manuwal, D.A., M.H. Huff, M.R. Bauer, C.B. Chappell, and K. Hegstad. 1987. Summer birds of the upper subalpine zone of Mount Adams, Mount Rainier, and Mount St. Helens, Washington. Northwest Science 61:82-92.

Ryan, M.R., and R.B. Renken. 1987. Habitat use by breeding Willets in the northern Great Plains. Wilson Bull. 99(2):175-189.

White, D. H., and J. T. Seginak. 1987. Cave gate designs for use in protecting endangered bats. Wildlife Society Bull. 15:445-449.

Arkoyd, B. 1987. Memorandum, Department of Game and Fish, Subject: Survey on West Fork of Tienditas Creek, Questa Ranger District, Carson National Forest.

Dulin, G. S. 1987. Pre-fledging feeding behavior and sibling rivalry in common loons. Central Michigan University, Mt. Pleasant, Michigan. M.S. thesis.

Boutin, S. and D. E. Birkenholz. 1987. Muskrat and Round-tailed Muskrat. Pages 314-324 In M. Novak, J. A. Baker, M. E. Obbard and B. Malloch (editors). Wild furbearer management and conservation in North America. Ontario Ministry of Natural Resources, Tor

Frederick, P. 1987. Chronic tidally-induced nest failure in a colony of white ibises. Condor 89:413-419.

Leonard, M. L., and J. Picman. 1987. Nesting success and habitat selection by marsh wrens. Auk 104:491-495.

O'Connell, M. W. 1987. Occurrence of the boreal owl in northeastern Washington. Pages 185-188 in Nero, R. W., et al., eds. Biology and conservation of northern forest owls. USDA For. Serv., Gen. Tech. Rep. RM-142.

Seal, U. S., and T. J. Kreeger. 1987. Chemical immobilization of furbearers. Pages 191-215 in M. Novak et al., editors. Wild furbearer management and conservation in North America. Ontario Ministry of Natural Resources.

U.S. Fish and Wildlife Service (USFWS). 23 December 1987. Finding on northern spotted owl petition. Federal Register 52:48552-48554.

Abts, M. L. 1987. Environment and variation in life history traits of the chuckwalla, Sauromalus obesus. Ecological Monographs 57:215-232.

Clark, T. W., et al. 1987. Martes americana. Am. Soc. Mamm., Mammalian Species 289:1-8.

Fuller, M. R., and J. A. Mosher. 1987. Raptor survey techniques. Pages 37-65 in B. A. Giron Pendleton, et al., eds. Raptor management techniques manual. National Wildlife Federation, Washington, D.C.

Littlefield, C. D., and S. P. Thompson. 1987. Winter habitat preferences of northern harriers on Malheur National Wildlife Refuge, Oregon. Oregon Birds 13:156-64.

Reynolds, R.T., and B.D. Linkhart. 1987b. The nesting biology of flammulated owls in Colorado. Pages 239-248 in R.W. Nero, R.J. Clark, R.J. Knapton, and R.H. Hamre, editors. Biology and conservation of northern forest owls. USDA Forest Service, Gen. Tech.

Wilson, M. H. and J. A. Crawford. 1987. Habitat selection by bobwhites and chestnut-bellied scaled quail in south Texas. Journal of Wildlife Management 51:575-582.

Janis, C. M., and K. M. Scott. 1987. The interrelationships of high ruminant families with special emphasis on the members of the Cervoidea. Am. Mus. Novitates 2893:1-85.

Dixon, J. R. 1987. Amphibians and reptiles of Texas. Texas A & M Univ. Press, College Station. xii + 434 pp.

Clough, G. C. 1987. Ecology of island muskrats, Ondatra zibethicus, adapted to upland habitat. Can. Field-Nat. 101:63-69.

Johnson, S. R., and D. M. Troy. 1987. Nesting of the Ross'goose and blue-phase snow goose in the Sagavanirktok river delta, Alaska. Condor 89:665-667.

Mills, A. 1987. Golden-winged warbler. Page 358 in M. D. Cadman, P. F. J. Eagles, and F. M. Helleiner (editors). Atlas of the breeding birds of Ontario. Federation of Ontario Naturalists, University of Waterloo Press, Waterloo, Ontario.

U.S. Fish and Wildlife Service (USFWS). 3 August 1987. Determination of threatened status and critical habitat for the Inyo brown towhee. Federal Register 52:28780-28786.

King, Wade. 1987. Map of Post Area, White Sands Missile Range. Directorate, Engineering, Housing and Logistics. September 1987.

Vogt, T.F. 1987. A preliminary report on threatened or endangered aquatic insects associated with lotic habitats in Illinois. Natural Lands Institute, Rockford, IL. 12pp.

Lincoln National Forest. 1987. Establishment Record for Haynes Canyon Research Natural Area. US Forest Service, 63 p.

Wemmer, C. M., editor. 1987. Biology and management of theCervidae: proceedings of a symposium. Smithsonian Inst. Press, Washington, D. C. 1000 pp.

Schweitzer, D. F. 1987. Catocala pretiosa, the precious underwing moth: results of a global status survey with a recommendation for retention in Category 2. Report from TNC to USFWS, Newton Corner, MA.

National Geographic Society (NGS). 1987. Field guide to the birds of North America. Second edition. National Geographic Society, Washington, D.C.

Adam, C. I. G. 1987. Status of the eastern screech owl in Saskatchewan with reference to adjacent areas. Pp. 268-276 in Nero, R. W., et al., eds. Biology and conservation of northern forest owls. USDA For. Serv. Gen. Tech. Rep. RM-142

Cochran, J. F., and S. H. Anderson. 1987. Comparison of habitat attributes at sites of stable and declining long- billed curlew populations. Great Basin Nat. 47:459-466.

Hafner, M. S., et al. 1987. Macrogeographic patterns of genetic differentiation in the pocket gopher THOMOMYS UMBRINUS. Syst. Zool. 36:18-34.

McNair, D. B. 1987. Egg data slips-are they useful for information on egg-laying dates and clutch size? Condor 89:369-76.

Schmutz, J. K., and R. W. Fyfe. 1987. Migration and mortality of Alberta ferruginous hawks. Condor 89:169-174.

Wiens, J.A., J.T. Rotenberry, and B. Van Horne. 1987. Habitat occupancy patterns of North American shrubsteppe birds: the effect of spatial scale. Oikos 48:132-147.

Chapman-Moser, B. 1987. Factors influencing reproductive success and nesting strategies in black terns. Ph.D. thesis, Simon Fraser Univ., British Columbia.

Firstencel, H. 1987. The black tern (CHLIDONIAS NIGER Linn.): breeding ecology in upstate New York and results of pesticide residue analysis. M.S. thesis, State Univ. of New York, Rockport. 63 pp.

Finch, D.M., S.H. Anderson, and W.A. Hubert. 1987. Habitat suitability index models: Lark Bunting. U.S. Fish and Wildlife Service, Biological Report 82. 16 pp.