References
Altman, B. and Sandbanks, R. 2000. Olive-sided Flycatcher Contopus cooperi. In Birds of North America, No. 502 (A. Poole and F. Gill, eds.). The Birds of North America, Inc. Philadelphia, PA.
Baird, J. and Nisbet, I. C. T. 1960. Northward fall migration on the Atlantic coast and its relation to offshore drift. Auk 77:119-149.
Ball, S. C. 1952. Fall bird migration in the Gaspe Penninsula. Peabody Museum of Natural History. Yale Univ. Bull., 7:1-211.
Dierschke, V. 1989. Automatisch-akustische erfassung des nachtlichen vogelzuges bei Helgoland im Sommer 1987. Die Vogelwarte 35:115-131.
Dixon, R. D. and Saab, V. A.. 2000. Black-backed Woodpecker Picoides arcticus. In Birds of North America, No. 509 (A. Poole and F. Gill, eds.). The Birds of North America, Inc. Philadelphia, PA.
Evans, W. R. 1994. Nocturnal flight call of Bicknell's Thrush. Wilson Bull. 106:55-61.
Gauthreaux, S. A. 1978. Importance of the daytime flights of nocturnal migrants: Redetermined migration following displacement. Pages 219-227 in Animal migration, navigation, and homing (K. Schmidt-Koenig and W. T. Keeton, Eds.) Springer-Verlag, Berlin.
Graber, R. R. and Cochran, W. W. 1959. An audio technique for the study of nocturnal bird migration of birds. Wilson Bull., Vol.71:220-236.
Graber, R. R. and Cochran, W. W. 1960. An evaluation of an aural record of nocturnal migration. Wilson Bull., 72:253-273.
Graber, R. R. 1968. Nocturnal migration in Illinois – different points of view. Wilson Bull. 80:36-71.
Greenwalt, C. H. 1968. Bird song: acoustics and physiology. Smithsonian; Washington DC.
Groth, J. G. 1993. Evolutionary differentiation in morphology, vocalizations, and allozymes among nomadic sibling species in the North American Red Crossbill Loxia curvirostra complex. Univ. of Calif. Publ. Zool. 127:1-143.
Hall, G. A., and Bell, R. K. 1981. The diurnal migration of passerines along an Appalachian ridge. Am. Birds 35:135-138.
Hamilton, W. J. III. 1962. Bobolink migratory pathways and their experimental analysis under night sky. Auk 79:208-233.
Howell, S. N. G. and Webb, S. 1995. The Birds of Mexico and Northern Central America. Oxford University Press, New York, NY.
Howes, P. G. 1912. Fall migration of the Olive-backed Thrush, 1912. The Oologist 31:162-167.
Jaramillo, A. and Burke, P. 1999. New World Blackbirds: The Icterids. Princeton University Press, Princeton, NJ.
Kopman, H. H. 1904. Bird migration phenomena in the extreme lower Mississippi Valley. Auk 11:45-50.
Lack, D. and Williamson, K. 1959. Bird-migration terms. Ibis 101:255-256.
Moore, F. R. 1990. Evidence for redetermination of migratory direction following wind displacement. Auk 107:425-428.
Larkin, R. P., Evans, W. R., Diehl, R. H. 2002. Nocturnal flight calls of Dickcissels and Doppler radar echoes over south Texas in spring. Journal of Field Ornithology 73:2-8.
Leonard, D. L. Jr. 2001. Three-toed Woodpecker Picoides tridactylus. In Birds of North America, No. 588 (A. Poole and F. Gill, eds.). The Birds of North America, Inc. Philadelphia, PA.
Libby, O. G. 1899. The nocturnal flight of migrating birds. Auk 16:140-145.
Mills, H. 1995. Automatic detection and classification of nocturnal migrant bird calls. J. Acoust. Soc. of Am. 97 (5). [Abstract].
Pyle, P., Howell, S. N. G., Yunick, R. P., and DeSante, D. F. 1987. Identification guide to North American passerines. Slate Creek Press, Bolinas California.
Ridgely, R. S. and Gwynne, J. 1989. A guide to the birds of Panama, 2nd edition. Princeton Univ. Press, Princeton, NJ.
Stiles, F. G. and Skutch, A. F. 1989. A guide to the birds of Costa Rica. Cornell Univ. Press, Ithaca, NY.
Thayer, G. H. 1903. The Mystery of the Black-billed Cuckoo. Bird Lore 5:143-145.
Tyler, W. M. 1916. The Call-notes of some nocturnal migrating birds. Auk 33:132-141.
Wiedner, D. S., Kerlinger, P., Sibley, D. A., Holt, P., Hough, J., and Crossley, R. 1992. Visible morning flight of neotropical landbird migrants at Cape May, New Jersey. Auk 109:500-510.