Marking, L. L. and T. D. Bills. 1981. Sensitivity of four species of carp to selected fish toxicants. North American Journal of Fisheries Management. 1:51-4.

Zammuto, R. M. and E. C. Franks. 1981. Environmental effects on roosting behavior of Chimney Swifts. Wilson Bulletin 93:77-84.

Bibby, C. J. 1981. Wintering bitterns in Britain. British Birds 74:1-10.

Keran, D. 1981. The incidence of man-caused and natural mortalities to raptors. Raptor Research 15:108-12.

Suter, G. W., II and J. L. Joness. 1981. Criteria for Golden Eagle, Ferruginous Hawk, and Prairie Falcon nest site protection. Raptor Res. 15:12-18.

Bednarz, J. C., and J. J. Dinsmore. 1981. Status, habitat use and management of red-shouldered hawks in Iowa. J. Wildlife Manage. 45:236-241.

Snyder, D. E. 1981. Contributions to a guide to the cypriniform fish larvae of the upper Colorado River system in Colorado. United States Bureau of Land Management, Biological Sciences Series 3, Denver, Colorado. 81 pp.

Aniskowicz, B. T. 1981. Behavior of a male least bittern IXOBRYCHUS EXILIS after loss of mate. Wilson Bulletin 93:395-397.

Houston, C. S. 1981. An assessment of Walter Raine and his Saskatchewan records. Bule Jay 39:168-81.

Rundle, W.D., and L.F. Fredrickson. 1981. Managing seasonally flooded impoundments for migrant rails and shorebirds. Wild. Soc. Bull. 9:80-87.

Maser, C., B. R. Mate, J. F. Franklin, and C. T. Dyrness. 1981. Natural history of Oregon coast mammals. Pacific Northwest Forest and Range Expt. Sta., USDA, Forest Service, Gen Tech. Rep. PNW-133:1-496.

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

Pyle, R. M. 1981. The Audubon Society Field Guide to North American Butterflies. Alfred A. Knopf, New York, New York. 916 pp. + color plates.

Christenson, B. L.. 1981. Reproductive ecology of and response to disturbance by common loons in Maine. University of Maine, Orono, Maine. M.S. thesis.

WESTEC Service, Inc. 1981. 810400. Status Report submitted to the Office of Endangered Species.

Crawford, H. S., R. G. Hooper, and R. W. Titterington. 1981. Songbird population response to silvicultural practices in central Appalachian hardwoods. Journal of Wildlife Management 45:680-92.

Massey, B. W. 1981. A least tern makes a right turn. Nat. Hist. 90:61-72.

Blem, C.R. 1981. Heterodon platyrhinos. Catalogue of American Amphibians and Reptiles. SSAR. NO. 282:1-2.

Kimmel, V. L., and L. H. Fredrickson. 1981. Nesting ecology of the red-shouldered hawk in southeastern missouri. Trans. Missouri Acad. Sci. 15:21-27.

Whitcomb, R. F., C. S. Robbins, J. F. Lynch, B. L. Whitcomb, M. K. Klimciewicz, and D. Bystrak. 1981. Effects of forest fragmentation on avifauna of the eastern deciduous forest. Pages 125-206 in R. L. Burgess, and B. L. Sharpe (editors). Forest island dy

Best, L.B., D.F. Stauffer, A.R. Geier, K.L. Varland, J.P. Vogler, R.B. Dahlgren, and R.Q. Landers. 1981. Effects of habitat alterations on riparian plant and animal communities in Iowa. U.S. Department of the Interior, Fish and Wildlife Service, FWS/OBS-8

Beedy, E.C. 1981. Bird communities and forest structure in the Sierra Nevada of California. Condor 83:97-105.

Thompson, C.F., and B.M. Gottfried. 1981. Nest discovery and selection by Brown-headed Cowbirds. Condor 83:268-269.

Chernoff, B., J. V. Conner, and C. F. Bryan. 1981. Systematics of the Menidia beryllina complex (Pisces: Atherinidae) from the Gulf of Mexico and its tributaries. Copeia 1981:319-336.

Hurlbert, S. H., and M. S. Mulla. 1981. Impacts of mosquitofish (Gambusia affinis) predation on plankton communities. Hydrobiologica 83:125-151.

Savaloja, T. 1981. Yellow Rail. Birding 13(3):80-85.

McDonald, J.N. 1981. North American Bison -- their classification and evolution. 316 pp.

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

Broschart, M.R. (1981) Nesting Study of a Peregrine Falcon Pair in the Carson National Forest, New Mexico.

Wallmo, O.C. 1981. The mule and black-tailed deer of North America. 605 pp.

Dinsmore, J. J. 1981. Piping plovers - a synthesis of the literature and an annotated bibliography. Unpublished report. 28 pp.

Worthington, R.D. 1981. Status report, Oenothera organensis, Organ Mountains Primrose, Fish and Wildlife Service, Albuquerque, NM. 9 p.

Koppinger, D.G. 1981. U.S. Geological Survey topographic map containing generalized locations of Rumex orthoneurus throughout the Coronado National Forest. Arizona Natural Heritage Program. 8 p.

Greenwalt, L. 1981. Rules and regulations: Eriogonum gypsophilum, Hedeoma todsenii. Federal Register. 46 (12):5730-5733.

Dalsted, K. J., et al. 1981. Application of remote sensing to prairie dog management. Journal of Range Management 34:218-23.

Morrison, M. L. 1981a. Population trends of the Loggerhead Shrike in the United States. American Birds 35(4):754-7.

Cameron, G.N. and S.R. Spencer. 1981. Sigmodon hispidus. Am. Soc. Mamm., Mammalian Species No. 158. 9 pp.

Lynch, J. M. 1981. Status of the cerulean warbler in the Roanoke River Basin of North Carolina. Chat 45(2):29-35.

Hay, M. A., and G. R. Lingle. 1981. The birds of Mormon Island Crane Meadows, Nebraska. Report to The Nature Conservancy, June 1981. 206 pp.

Behrstock, R. A. 1981. Prey-induced mortality of a pied-billed grebe. Western Birds 12:183-4.

Toweill, D. E., and J. G. Teer. 1981. Home range and den habits of Texas ringtails (Bassariscus astutus flavus). Pages 1103-1120 IN Chapman, J. A., and Pursley, D. (editors). Worldwide Furbearer Conference Proceedings, Frostburg, Maryland.

Cole, G.A. 1981. Gammarus desperatus, a new species from New Mexico (Crustacea:Amphipoda). Hydrobiologia, 76:27-32.

Johnson, K. 1981. Social organization in a colony of rock squirrels (Spermophilus variegatus). Southwestern Naturalist 26:237-242.

Messick, J. P., and M. G. Hornocker. 1981. Ecology of the badger in southwestern Idaho. Wildlife Monographs 76:1-53.

Minckley, W. L. 1981. Ecological studies of Aravaipa Creek, central Arizona, relative to past, present, and future uses. Final Report. U.S. Bureau of Land Management, Safford, Arizona. Contract Number YA-512-CT6-98. 362 pp.

Dunham, A. E. 1981. Populations in a fluctuating environment: the comparative population ecology of the iguanid lizards Sceloporus merriami and Urosaurus ornatus. University of Michigan Museum of Zoology Miscellaneous Publications (158): 1-62.

Conner, J. and A. Price. 1981. Inventory of terrestrial wildlife species for the Stallion Planning Unit based on methods from the Integrated Habitat and Classification System (IHICS), Prepared by Socorro District, BLM. 206p.+app.

Fletcher, R.1981. Anticipated Effects of Timber sale on Allium gooddingii. United States Forest Service (USFS) Regional Office, Albuqueruqe, NM. p.9.

Worthington, R. 1981. Status Report for Potentilla sierrae-blancae. Endangered Species Office, Fish and Wildlife Service, Albuquerque, New Mexico. USDS

Dexter, R. W. 1981a. Nesting success of Chimney Swifts related to age and the number of adults at the nest, and the subsequent fate of the visitors. Journal of Field Ornithology 52:228-232.

O'Farrell, M.J. 1981. Status report: Euderma maculatum. Prepared for Office of End. Spp. US Fish and Wildlife Service, P.O. Box 1306, Albq, NM. 87103. Pp 1-29.

Cannings, R. J., and W. Threlfall. 1981. Horned Lark Eremophila alpestris breeding biology at Cape St. Mary's, Newfoundland, Canada. Wilson Bulletin 93:519-530.

Messick, J. P., M. C. Todd, and M. G. Hornocker. 1981. Comparative ecology of two badger populations. Pages 1290-1304 in Proceedings of the Worldwide Furbearer Conference (J. A. Chapman and D. Pursley, editors). Worldwide Furbearer Conference, Inc., Frost

Lanyon, W.E. 1981. Breeding birds and old field succession on fallow Long Island farmland. Bulletin of the American Museum of Natural History. Volume 168. 60 pp.

Bowman, T. E. 1981. Thermosphaeroma milleri and T. smithi, new sphaeromatid isopod crustaceans from hot springs in Chihuahua, Mexico, with a review of the genus. J. Crust. Biol. 1: pp. 105-122.

Hoffmeister, D.F. 1981. PEROMYSCUS TRUEI. Mammalian Species,161:1-5.

Walker, J. M. 1981. Systematics of Cnemidophorus gularis. I. Reallocation of populations currently allocated to Cnemidophorus gularis and Cnemidophorus scalaris in Coahuila, Mexico. Copeia 1981:826-849.

Collins, S. L. 1981. A comparison of nest-site and perch-site vegetation structure for seven species of warblers. Wilson Bulletin 93:542-547.

Johnson, O. W., P. M. Johnson, and P. L. Bruner. 1981. Wintering behavior and site-faithfulness of golden plover onOahu. 'Elepaio 41:123-130.

Tate, J. 1981. The Blue List for 1981: the first decade. American Birds 35:3-10.