Sanchez, B. (1991) Formal Spotted Owl Monitoring, Management Territory 0602005. Silver City Ranger District, Gila National Forest, USFS. 11 p.

Buehler, D. A., et al. 1991e. Winter microclimate of bald eagle roosts on the northern Chesapeake Bay. Auk 108:612-618.

Doncaster, C. P., and D. W. MacDonald. 1991. Drifting territoriality in the red fox Vulpes vulpes. J. Anim. Ecol. 60:423-439.

Hoffman, R. W. 1991. Spring movements, roosting activities, and home-range characteristics of male Merriam's wild turkey. Southwest. Nat. 36:332-337.

Mah, J., and G. L. Nuechterlein. 1991. Feeding behavior of red-winged blackbirds on bird-resistant sunflowers. Wildl. Soc. Bull. 19:39-46.

Platania, S. P., K. R. Bestgen, M. A. Moretti, D. L. Propst, and J. E. Brooks. 1991. Status of Colorado squawfish and razorback sucker in the San Juan River, Colorado, New Mexico, and Utah. Southwestern Naturalist 36:147-150.

Wiedenfeld, D. A. 1991. Geographical morphology of male yellow warblers. Condor 93:712-723.

Greaves, J. M. and M. V. Gray. 1991. The Least Bell's Vireo population in the Gibraltar Reservoir area during 1991. Final report to Los Padres National Forest, Goleta, CA.

Aguilera, E., R. L. Knight, and J. L. Cummings. 1991. An evaluation of two hazing methods for urban Canada geese. Wildl. Soc. Bull. 19:32-35.

Cully, J.F. JR. 1991. Response of raptors to reduction of a Gunnison's prairie dog population by plague.. American Midland Naturalist. 125:140-149.

Grimm, M. 1991. Northeast Wisconsin Yellow Rail survey. Passenger Pigeon 53(2):115-121.

Lehman, N., et al. 1991. Introgression of coyote mitochondrial DNA into sympatric North American gray wolf populations. Evolution 45:104-119.

Pfennig, D. W., A. Mabry, and D. Orange. 1991. Environmental causes of correlations between age and size at metamorphosis in Scaphiopus multiplicatus. Ecology 72:2240-2248.

Stern, M. A., and R. L. Jarvis. 1991. Sexual dimorphism and assortative mating in black terns. Wilson Bull. 103(2): 266-271.

Lackey, J. A. 1991. Chaetodipus spinatus. Am. Soc. Mamm., Mammalian species No. 385:1-4.

Ashton, R. E., Jr., and P. S. Ashton. 1991. Handbook of reptiles and amphibians of Florida. Part two. Lizards, turtles & crocodilians. Revised second edition. Windward Pub., Inc., Miami. 191 pp.

Spahr, R., L. Armstrong, D. Atwood, and M. Rath. 1991. Threatened, endangered, and sensitive species of the Intermountain Region. U.S. Forest Service, Ogden, Utah.

DeBruin, E. 1991. Field survey to Farmington Resource Area - Tucker Canyon plot #9 on 1 May 1991.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #6A, 27 May, 1991

DeBruin, E. 1991. Field survey to Farmington Resource Area - Tucker Canyon stop #4 on 1 May 1991.

Dunmire, W.W. 1991. T + E and sensitive plant survey Sawtooth ACEC Socorro Resource Area BLM. Unpublished report by TNC, NM Field Office. 9 p + maps.

Joyner-Griffith, M. A. 1991. Neonatal desert tortoise (GOPHERUS AGASSIZII) biology: analyses of morphology, evaporative water loss and nautral egg production followed by neonatal emergence in the central Mojave Desert. California State University, Domingu

Powell, A. N. 1991. Monitoring black tern populations in Minnesota in association with the USFWS Waterfowl Production Survey. unpublished report to Minnesota Department of Natural Resources Nongame Program.

Block, S. B., and E. G. Zimmerman. 1991. Allozymic variation and systematics of plains pocket gophers (Geomys) of south-central Texas. The Southwestern Naturalist 36:29-36.

Clayton, P. 1991. Field survey to Ball Ranch - Stop #20 on 5 Aug 1991.

Gilbert, F.F., and R. Allwine. 1991. Spring bird communities in the Oregon Cascade Range. Pages 145-158 in L.F. Ruggiero, K.B. Aubry, A.B. Carey, and M.H. Huff, technical coordinators. Wildlife and Vegetation of unmanaged Douglas-fir Forests. USDA Forest

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #32 29 May, 1991.

Mehlhop, P. 1991. Field survey to Faywood Cienega on 28 April 1991.

Hepp, G. R., and J. E. Hines. 1991. Factors affecting winter distribution and migration distance of wood ducks from southern breeding populations. Condor 93:884-891.

Morimoto, D. C., and F. E. Wasserman. 1991. Dispersion patterns and habitat associations of rufous-sided towhees, common yellowthroats, and prairie warblers in the southeastern Massachusetts pine barrens. Auk 108:264-276.

Seutin, G. 1991. Morphometric identification of Traill's flycatchers: an assessment of Stein's formula. Journal of Field Ornithology 62:308-313.

Anderson, J. Hall, D. (1991) 1991 Mexican Spotted Owl Dayime Follow-up Visit Form. Sandia Ranger District, Cibola National Forest, USFS. 2 p.

Frybarger, S. (1991) 1991 Mexican Spotted Owl Inventory Form. Retrieved from Silver City Ranger District, Gila National Forest, USFS. 36 p.

Taylor, I. R. 1991. Effects of nest inspections and radiotagging on barn owl breeding success. J. Wildl. Manage. 55:312-315.

Orr, M.V. 1991. Threatened, endangered and sensitive plants, observation record for Pediocactus papyracanthus.

Unknown (1991) Multiple Bundled Mexican Spotted Owl Territory Data Sheets and Related Documents. Lincoln Supervisor's Office, Lincoln National Foresy, USFS. 519 p.

Minckley, W. L., and J. E. Deacon. 1991. Battle Against Extinction: Native Fish Management in the American West. University of Arizona Press, Tucson. xviii + 517 pp.

Conley, M. 1991. Letter to Commander, U.S. Army, White Sands Missile Range, att: STEW-EL-N (Ms. Y. Hart), subject: threatened and endangered plant and animal survey at ABC flip side site (WAO 300-07). 20 Feb 1991.

Kirkeminde, M. 1991. Unpub field notes for survey to Mogollon Mts - Little Turkey Creek on 10 June 1991. 1 p + map.

Reynolds, R.T. et al. (1991) Management Recommendations for the Northern Goshawk in the Southwestern United States. Retrieved from Guadalupe Ranger District, Lincoln National Forest, USFS. 204 p.

DeBruin, E. Sept 1991. Special plant survey form, NM for Coryphantha organensis in Organ Mts.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #11 23 May, 1991.

DeBruin, E. 1991. Field survey to Farmington Resource Area - Radio tower plot #11 on 3 May 1991.

Mehlhop, P. 1991. Field survey of August 26,1991 to Salt Creek, White Sands Missile Range.

DeBruin, E. 1991. Field survey to Fort Stanton ACEC - Stop #40 30 May, 1991.

Mehlhop, P. and R. Smartt. 1991. Field trip to the Dona Ana Mountains, 12 September.

Baker, M. C., and E. M. Baker. 1991. Reproductive behavior of female buntings: isolating mechanisms in a hybridizing pair of species. Evolution 44:332-338.

Frawley, B.J., and L.B. Best. 1991. Effects of mowing on breeding bird abundance and species composition in alfalfa fields. Wildlife Society Bulletin 19:135-142.

Johnson, G. D., and M. S. Boyce. 1991. Survival, growth, and reproduction of captive-reared sage grouse. Wildl. Soc. Bull. 19:88-93.

Propst, D. Bestgen, K. 1991. Habitat and Biology of the Loach Minnow, Tiaroga cobitis, in New Mexico. Copeia, 1991(1) pp. 29-38. American Society of Ichythyologists and Herpetrologists. USFS

Shackford, J.S. 1991. Breeding ecology of the Mountain Plover in Oklahoma. Bull. Okla. Ornithol. Soc. 24:9-13.

Zwickel, F. C., et al. 1991. Sexual and subspecific variation in the number of rectrices of blue grouse. Can. J. Zool. 69:134-140.

Burns, B. FRybarder, S. (1991) 1991 Mexican Spotted Owl Inventory Form. Retreived from Silver City Ranger District, Gila National Forest, USFS. 28 p.

Cibola National Forest. 1991. Mexican Spotted Owl daytime follow-up visit form, survey for Mexican Spotted Owl.

Hagerdon, M. 1991. Threatened, endangered and sensitive plants observation record for Lilium philadelphicum. US Forest Service

Harris, D. 1991. 1990 Mexican Spotted Owl Inventory Form, El Rito Ranger District, Carosn National Forest. 3p.

Schwarz, H.R. (1991) Gray Vireo Observations in the Sandia Mountains of Central New Mexico. Retrieved from Guadalupe Ranger District, Lincoln National Forest, USFS. 7 p.

Buehler, D. A., et al. 1991c. Survival rates and population dynamics of bald eagles on Chesapeake Bay. J. Wildlife Management 55:608-613.

Ellis, D. H., C. H. Ellis, and D. P. Mindell. 1991. Raptor responses to low-level jet aircraft and sonic booms. Env. Poll. 74:53-83.

Hunter, J. E. 1991. Grazing and pocket gopher abundance in a California annual grassland. Southwest. Nat. 36:17-18.