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Seegmiller, R. F., and R. D. Ohmart. 1981. Ecological relationships of feral burros and desert bighorn sheep. Wildlife Monographs No. 78:1-58.

Smith, E. L. 1981. Effects of canoeing on common loon production and survival on the Kenai National Wildlife Refuge, Alaska. Colorado State University, Fort Collins, Colorado. M.S. thesis.

Milburn, T. 1981. STATUS & DISTRIBUTION OF THE LOGGERHEAD SHRIKE, LANIUS LUDOVICIANUS IN THE NORTHEASTERN U.S. UNPUB- LISHED REPORT SUBMITTED TO THE USDI/FWS OFFICE OF ENDANGERED SPECIES. 77 PP.

Hulse, A. C. 1981. Ecology and reproduction of the parthenogenetic lizard Cnemidophorus uniparens (Teiidae). Ann. Carnegie Mus. Nat. Hist. 50:353-369.

Shugart, G. W., M. A. Fitch, and V. M. Shugart. 1981. Minimizing investigator disturbance in observational studiesof colonial birds: access to blind through tunnels. WilsonBull. 93:565-569.

Craven, S.R. 1981. The Canada goose (BRANTA CANADENSIS)- an annotated bibliography. U.S. Dept. of Interior, FWS. Special Scientific Report No. 231. 66 pp.

Noon, B. R. 1981. The distribution of an avian guild along a temperate elevational gradient: the importance and expresion of competition. Ecological Monographs 51:105-24.

Stinnett, S. S. 1981. Food habits and effects of Gunnison's, Zuni, and black-tailed prairie dogs on plant communities in New Mexico. NMSU, Las Cruces, NM. M.S. Thesis. 138 pp.

Engstrom, M. D., and D. E. Wilson. 1981. Systematics of ANTROZOUS DUBIAQUERCUS (Chiroptera: Vespertilionidae), with comments on the status of BAUERUS Van Gelder. Annals of Carnegie Museum 50:371-383.

Karasov, W. H. 1981. Daily energy expenditure and the cost of activity in a free-living mammal. Oecologia 51:253-259.

Whitmore, R.C. 1981. Structural characteristics of Grasshopper Sparrow habitat. Journal of Wildlife Management 45:811-814.

McCabe, T. L. 1981. The Dakota skipper, Hesperia dacotae (Skinner): range and biology, with special reference to North Dakota. Journal of the Lepidopterists' Society 35(3): 179-193.

Wallis, C.A., and C.R. Wershler. 1981. Status and breeding of Mountain Plovers (Charadrius montanus) in Canada. Canadian Field-Naturalist 95:133-136.

Trautman, M. B. 1981. The fishes of Ohio. Second edition. Ohio State University Press, Columbus, Ohio. 782 pp.

Cronquist, A. 1981. An integrated system of classification of flowering plants. Columbia Univ. Press, New York. 1262 pp.

Taylor, D.W. 1981. Photograph of Lymnaea caperata habitat taken on field survey of mussels in New Mexico on May 15, 1981.

Sepik, G. F., R. B. Owen, Jr., and M. W. Coulter. 1981. A landowner's guide to woodcock management in the Northeast. University of Maine Agricultural Experiment Station Misc. Rep. 253. 23 pp.

Spellenberg, R. 1981.Survey for threatened or endangered species on the Bitsi-Star Lake area, northwestern NM. BLM. 64p.

Mossman, M. 1981. The 1981 black tern survey. Unpubl. report, Office of Endangered and Nongame Species, Wisconsin Dept. of Natural Resources, Madison, WI. 9 pp.

Apfelbaum, S., and A. Haney. 1981. Bird populations before and after wild fire in a Great Lakes USA pine forest. Condor 83(4):347-354.

Johnson, T.B. and R.B. Spicer. 1981. Mountain plovers on the New Mexico-Arizona border. Continental Birdlife 2(3): 69-73. June 1981.

Titus, K., and J. A. Mosher. 1981. Nest site habitat selection by woodland hawks in the central Appalachians. Auk 98:270-281.

Koppinger, D.G. 1981. Occurence map of Psoralea pentophylla. Arizona Natural Heritage Program. USFS.

Fitch, J.H., K.A. Shump, Jr., and A.U. Shump. 1981. Myotis velifer. Mammalian species 149:1-5.

O'Meara, T., J. Haufler, L. Stelter, and J. Nagy. 1981. Nongame wildlife responses to chaining of Pinyon-Juniper woodlands. Journal of Wildlife Management 45(2):381-389.

Facey, D.E. and G. Labar. 1981. Biology of American eels in Lake Champlain, Vermont. Transactions of the American Fisheries Society 110(3): 396-402.

King, B. 1981. The field identification of North American pipits. American Birds 35:778-88.

Williams, J. E., and G. R. Wilde. 1981. Taxonomic status and morphology of isolated populations of the White River springfish, Crenichthys baileyi (Cyprinodontidae). Southwestern Naturalist 25(4):485-503.

Merritt, J.F. 1981. Clethrionomys gapperi. Am. Soc. Mamm.,Mammalian Species No. 146. 9 pp.

Wentworth, T.R. 1981. Vegetation on limestone and granite in the Mule Mtn, Arizona. Ecology. 62(2):469-482.

Vogt, R. C. 1981c. Natural history of amphibians and reptiles of Wisconsin. Milwaukee Public Museum. 205 pp.

Crum, H.A., and L.E. Anderson. 1981. Mosses of eastern North America. 2 Volumes. Columbia Univ. Press, New York. 1328 pp.

U.S. Fish and Wildlife Service (USFWS). 1981. Plymouth red-bellied turtle recovery plan. U.S. Fish and Wildlife Service, Region 5. 13 pp.

Worthington, R.D. 1981. Status report [on Silene plankii]. Report prepared for U.S. Fish & Wildlife Service, Albuquerque, New Mexico.

Sedgwick, J. A. 1981. Breeding bird and small mammal habitat relationships in northwestern Colorado. Ph.D. Dissertation, Colorado State University. 139 pp.

Goldwasser, S. 1981. Habitat requirements of the Least Bell's Vireo. Final Rep., California Dept. of Fish and Game, Sacramento, CA.

Byrd, G. V., and C. F. Zeillemaker. 1981. Ecology of nesting Hawaiian common gallinules at Hanalei, Hawaii. W. Birds 12:105-116.

Kerlinger, P., and C. Doremus. 1981. Habitat disturbance and the decline of dominant avian species in pine barrens of the northeastern United States. American Birds 35:16-20.

Veselack, M. S. and J. J. Nisbet. 1981. The distribution and uses of Arundo donax (abstract). Proc. Indiana Acad. Sci. 90:92.

Green, B.H., and H.D. Smith. 1981. Habitat utilization by sage sparrows in mixed desert shrub community. Abstract only. Encyclia 58:159.

Payne, N. F. 1981. Accuracy of aerial censusing for beaver colonies in Newfoundland. Journal of Wildlife Management 45:1014-1016.

Frest, T.J. and R.S. Rhodes, II. 1981. Oreohelix strigosa cooperi (Binney) in the Midwest Pleistocene. The Nautilus, 95: 47-55.

Lawson, R., and H. C. Dessauer. 1981. Electrophoretic evaluation of the colubrid genus ELAPHE Fitzinger. Isozyme Bull. 14:83.

Zammuto, R. M., E. C. Franks, and C. R. Preston. 1981. Factors associated with the interval between feeding visits in brood-rearing Chimney Swifts. Journal of Field Ornithology 52:134-139.

Day, J. C. U. 1981. Status of bitterns in Europe since 1976. British Birds. 74:10-6.

Morrison, M.L. 1981b. The structure of western warbler assemblages: analysis of foraging behavior and habitat selection in Oregon. Auk 98:578-588.

Dressler, R. 1981. The Orchids: Natural History and Classification. Harvard Univ. Press, Cambridge, MA. 332 pp.

Carlton, K. 1981. Jornada del Muerto Lava Cave System, a report. BLM, Socorro District. 25 September 1981. 24 pp.

Spellenberg, R. Ward, D. 1981. Status Report on Silene Wrightii. Department of Biology, New Mexico State University, Las Cruces, New Mexico. USFS

Cannon, R. W., and F. L. Knopf. 1981. Lek numbers as a trend index to prairie grouse populations. Journal of Wildlife Management 45:776-778.

Marshall, J. T., and R. D. Sage. 1981. Taxonomy of the house mouse. Symp. Zool. Soc. London 47:15-25.

Wiens, J.A., and J.T. Rotenberry. 1981. Habitat associations and community structure of birds in shrubsteppe environments. Ecological Monographs 51:21-41.

Hammerquist-Wilson, M. N. and J. A. Crawford. 1981. Response of bobwhite to cover changes within three grazing systems. Jounal of Range Management 34:213-215.

Phillips, D. P., W. E. Childers, and G. S. Whitt. 1981. Management implications for different genetic stocks of largemouth bass (Micropterus salmoides) in the United States. Canadian Journal of Fisheries and Aquatic Sciences 38:1715-1723.

Freedman, B., C. Beauchamp, I. A. McLaren, and S. I. Tingley. 1981. Forestry management practices and populations of breeding birds in a hardwood forest in Nova Scotia. Canadian Field-Naturalist 95:307-311.

Matteson, S. W., and J. O. Riley. 1981. Distribution and nesting success of Zone-tailed Hawks in west Texas. Wilson Bulletin 107:719-723.

Dexter, R. W. 1981b. Chimney Swifts reuse ten-year-old nest. North American Bird Bander 6:136-137.

Moulton, M. P., J. R. Choate, S. J. Bissell, and R. A. Nicholson. 1981. Associations of small mammals on the central high plains of eastern Colorado. Southwestern Naturalist 26(1):53-57.

Hall, E. R. 1981a. The Mammals of North America, second edition. Vols. I & II. John Wiley & Sons, New York, New York. 1181 pp.