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Keith Bildstein
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Keith Bildstein

   Biography

Keith L. Bildstein is Sarkis Acopian Director of Conservation Science at Hawk Mountain Sanctuary in Kempton, Pennsylvania, where he oversees the Sanctuary’s conservation science and education programs, and coordinates the activities of its graduate students, international interns, and visiting scientists.
Bildstein received his B.S. in Biology at Muhlenberg College, in Allentown, Pennsylvania, in 1972, and his Masters and Ph. D. in Zoology from the Ohio State University, in Columbus, Ohio, in 1976 and 1978. He currently is Adjunct Professor of Wildlife Biology at the State University of New York-Syracuse. He was Visiting Assistant Professor of Biology at the College of William and Mary, in Williamsburg, Virginia, in 1978, and Distinguished Professor of Biology at Winthrop University in Rock Hill, South Carolina, from 1978 to 1992. He is a Fellow of the American Ornithologists’ Union, and has been President of the Wilson Ornithological Society and the Waterbird Society, and Vice-president of the Raptor Research Foundation. Bildstein edited the Wilson Bulletin, a quarterly journal of ornithology, from 1984 through 1987, and was a member of the editorial board of The Auk, the AOU’s journal, in 1997-2000. He has helped organize the scientific programs of seven national and seven international ornithological meetings.
Bildstein has authored or coauthored more than 100 papers in ecology and conservation, including 40 on raptors. His books include White Ibis: wetland wanderer (1993), The raptor migration watch-site manual (1995 {with Jorje Zalles]), Raptor watch: a global directory of raptor migration sites (2000 [with Jorje Zalles]), and Migrating raptors of the world: their ecology and conservation (2006). His co-edited works include Conservation Biology of Flamingos (2000), Hawkwatching in the Americas (2001), Neotropical Raptors (2007), and Raptor Research and Management Techniques (2007).

Hawk Mountain Sanctuary Association
Acopian Center for Conservation Learning  410 Summer Valley Road
Orwigsburg,  PA  17961  United States
Phone: (570) 943-3411 ext 108 Fax: (570) 943-2284
Email: Bildstein@hawkmtn.org


   Research Interests

The geography, ecology, and conservation of the world’s migratory raptors; energy management in migrating raptors; the feeding and movement ecology of New and Old World vultures; and the wintering, breeding, and movement ecology of American Kestrels.

Species of Interest: 
  • Turkey Vulture
  • Black Vulture
  • Swallow-tailed Kite
  • Sharp-shinned Hawk
  • Cooper's Hawk
  • Northern Harrier
  • Broad-winged Hawk
  • Red-tailed Hawk
  • American Kestrel


   Publications

Katzner, T.E., E.A. Bragin, A.E. Bragin, M. McGrady, Miller, T.A. and K.L. Bildstein. 2016. Unusual clockwise loop migration lengthens travel distances and increases potential risks for a central Asian, long distance, trans-equatorial migrant, the Red-footed Falcon Falco vespertinus. Bird Study 63(3):406-412.

Mallon, J.M., K.L. Bildstein, and T.E. Katzner. 2016. In-flight turbulence benefits soaring birds. Auk 133(1):79-85.

Jallow, M., C.R. Barlow, L. Sanyang, L. Dibba, C. Kendall, M. Bechard, & K.L. Bildstein. 2016. High population density of the critically endangered Hooded Vulture Necrosyrtes monachus in western region, The Gambia, confirmed by road surveys in 2013 and 2015. Malimbus 38: 23-28

Bildstein, K.L., and L.J. Goodrich. 2012. What's missing in hawk watching today?. Birding 44:36-43.

Katzner,T., B. Smith, T.A. Miller, D. Brandes, J. Cooper, M. Lanzone, D. Brauning, C. Farmer, S. Harding, D.E. Kramar, C. Koppie, C. Maisonneuve, M. Martell, E.R. Mojica, C. Todd, J.A. Tremblay, M. Wheeler, D.F. Brinker, T.E. Chubbs, R. Gubler, K. O'Malley, S. Mehus, B. Porter, R.P. Brooks, B.D. Watts, and K.L. Bildstein. 2012. Status, biology, and conservation priorities for North America's eastern Golden Eagle (Aquila chrysaetos) population. Auk 129:168-176.

Ananian, V., K. Aghababyan, S. Tumanyan, G. Janoian, and K. Bildstein. 2011. Levant Sparrowhawk Accipiter brevipes breeding populations in Yerevan and trhe Meghri region, Armenia. Sandgrouse 33:114-119.

Bildstein, K.L. 2011. Island mystery. Hawk Mountain News 115:8-11.

Barber, D.R., and K.L. Bildstein. 2011. A lightweight portable, walk-in trap for catching vultures. Vulture News 60:22-23.

Bohrer, G., D. Brandes, J.T. Mandel, K.L. Bildstein, T.A. Miller, M. Lanzone, T. Katzner, C. Maisonneuve, and J.A. Tremblay. 2011. Estimating updraft velocity components over large spatial scales: contrasting migration strategies of Golden Eagles and Turkey Vultures. Ecology Letters doi: 10.1111/j.1461-0248.2011.01713.        pdf

Houston, C.S., P.D. McLoughlin, J.T. Mandel, M.J. Bechard, M.J. Stoffel, D.R. Barber, and K.L. Bildstein/ 2011. Breeding home ranges of migratory Turkey Vultures near their northern limit. Wilson Journal of Ornithology 123:472-478.       pdf

Bildstein, K.L.. 2010. (Abstract) Migration watchsite counts. P. 99 in G. Sundev, R. Watson, M. Curti, R. Yosef, E. Potapov, and M. Gilbert (eds.). Asian raptors: science and conservation for present and future: The proceedings of the 6th International Conference on Asian Raptors. Asian Raptor Research and Conservation Network, Mongolian Ornithological Society, and National University of Mongolia, Ulaanbaatar, Mongolia.

Bildstein, K.L.. 2010. (Abstract) Roadside surveys. P. 100 in G. Sundev, R. Watson, M. Curti, R. Yosef, E. Potapov, and M. Gilbert (eds.). Asian raptors: science and conservation for present and future: The proceedings of the 6th International Conference on Asian Raptors. Asian Raptor Research and Conservation Network, Mongolian Ornithological Society, and National University of Mongolia, Ulaanbaatar, Mongolia.

Faaborg, J., R.T. Holmes, A.D. Anders, K.L. Bildstein, K.M. Dugger, S.A. Gauthreaux, Jr., P. Heglund, K.A. Hobson, A.E. Jahn, D.H. Johnson, S.C. Latta, D.J. Levey, P.P. Marra, C.L. Merkord, E. Nol, S.I. Rothstein, T.W. Sherry, T.S. Sillett, F.R. Thompson III, and N. Warnock. 2010. Conserving landbirds in North America: do we know enough? Ecological Applications 20:398-418.       pdf

Farmer, C.J., K. Safi, D.R. Barber, I. Newton, M. Martell, and K.L. Bildstein. 2010. Efficacy of migration counts for monitoring continental populations of raptors: an example using the Osprey (Pandion haliaetus). Auk 127:863-870.       pdf

Hinnebusch, D.M., J.-F. Therrien, M.-A. Valiquette, B. Robertson, S. Robertson, and K.L. Bildstein. 2010. Survival, site fidelity, and population trends of American Kestrels wintering in southwestern Florida. Wilson Journal of Ornithology 122:475–483.       pdf

Medica, D.L., and K.L. Bildstein. 2009. Annual variation in West Nile virus antibodies in American Kestrels (Falco sparverius) in eastern Pennsylvania. Journal of Raptor Research 43:301–307.       pdf

Sarasola, J.H., J.J. Negro, K.A. Hobson, G.R. Bortolotti, and K.L. Bildstein. 2008. Can a 'wintering area effect' explain population status of Swainson's Hawks? A stable isotope approach. Biodiversity Research 14:686-691.       pdf

Bildstein, K.L. 2007. (Review of) Raptors: a field guide to survey and monitoring, by J. Hardy, H. Crick, C. Wernham, H. Riley, B. Etheridge, and D. Thompson. Journal of Raptor Research J. Raptor Research 41:256–257.       pdf

Bildstein, K.L., J.P. Smith, and R. Yosef. 2007. Migration counts and monitoring. Pp. 101-115 in D.M. Bird and K.L. Bildstein (eds.), Raptor research and management techniques. Hancock House Publishers, Surrey, British Columbia.

Bird, D.M., and K.L. Bildstein (eds.). 2007. (Book) Raptor research and management techniques. Hancock House Publishers, Surrey, British Columbia.

Medica, D.L., R. Clauser, and K. Bildstein. 2007. Prevalence of West Nile Virus antibodies in a breeding population of American Kestrels (Falco sparverius) in Pennsylvania. Journal of Wildlife Diseases 43:538-541.        pdf

Bildstein, K.L. 2006. (Book) Migrating raptors of the world: their ecology and conservation. Cornell University Press, Ithaca, NY.

Bildstein, K.L. 2006. Vultures under scrutiny: research at Hawk Mountain closes the gap. WildBird 20:49-51.

Bildstein, K. 2006. Everywhere birds. Hawk Mountain News 105:10-12.

Bildstein, K.L., M.J. Bechard, P. Porras, and E. Campos. 2006 (Abstract) Seasonal abundances and distributions of Black (Coragyps atratus) and Turkey (Cathartes aura) Vultures in Costa Rica and Panama: evidence for reciprocal migration in the Neotropics. P. 11 in II Neotropical Raptor Conference, Iguazú, Argentina, 11-14 June 2006. The Peregrine Fund. Boise, ID.

Careau, V., J.-F. Therrien, P. Porras, D. Thomas, and K. Bildstein. 2006. Soaring and gliding flight of migrating Broad-winged Hawks: behavior in the Nearctic and Neotropics compared. Wilson Journal of Ornithology 118:471-477.       pdf

DeCandido, R., R.O. Bierregaard, Jr., M.S. Martell, and K.L. Bildstein. 2006. Evidence of nocturnal migration by Osprey (Pandion haliaetus) in North America and western Europe. Journal of Raptor Research 40:156-158.       pdf

DeCandido, R., D. Allen, and K.L. Bildstein. 2006. Spring migration of Oriental Honey-buzzards Pernis ptilorhynchus and other raptors at Tanjung Tuan, Malaysia, 2000-2001. Forktail 22:156-160.

Bildstein, K.L., and J.I. Zalles. 2005. Old World versus New World long-distance migration in accipiters, buteos, and falcons. Pp. 154-167 in R. Greenberg, and P. Marra (eds.), Birds of two worlds: the ecology and evolution of migration. John Hopkins University Press, Baltimore, MD.

Sarasola, J.H., J.J. Negro, G. Bortolotti, K. Hobson, and K. Bildstein. 2006. (Abstract) An assessment of wintering segregation of Swainson's Hawks (Buteo swainsoni) according to their breeding origins in North America using stable isotope analysis. Pp. 16-17 in Program of the II Neotropical Ornithological Conference, Iguazú, Argentina, 11-14 June 2006. The Peregrine Fund.

Sympson, L., A. Trejo, P. Capllonch, V. Sympson, V. Ojeda, M. Gelain, M.J. Bechard, and K.L. Bildstein. 2006. (Abstract) Distribution and migratory status of the White-throated Hawk (Buteo albigula). Pp. 10-11 in Program of the II Neotropical Ornithological Conference, Iguazú, Argentina, 11-14 June 2006. The Peregrine Fund, Boise, ID.

Farmer, G.C., K. McCarty, S. Robertson, B. Robertson, and K.L. Bildstein. 2006. Suspected predation by accipiters on radio-tracked American Kestrels (Falco sparverius) in eastern Pennsylvania, U.S. Journal of Raptor Research 40:294-297.       pdf

Zucchini, M., M.J. Bechard, and K.L. Bildstein. 2006. (Abstract) Flight strategies of Neotropical migrants in Panama. Pp. 13-14 in Program of the II Neotropical Ornithological Conference, Iguazú, Argentina, 11-14 June 2006. The Peregrine Fund, Boise, ID.

DeCandido, R., R.O. Bierregaard, Jr., M.S. Martell, and K.L. Bildstein. 2006. Evidence of nocturnal migration by Osprey (Pandion haliaetus) in North America and western Europe. Journal of Raptor Research 40:156-158.

Ferland-Raymond, B., M. Bachand, D. Thomas, and K. Bildstein. 2005. Flapping rates of migrating and foraging Turkey Vultures Cathartes aura in Costa Rica. Vulture News 53:4-9.       pdf

Jensen, W.J., M.S. Gregory, G.A. Baldassare, F.J. Villela, and K.L. Bildstein. 2005. Raptor abundance and distribution in the llanos wetlands of Venezuela. Journal of Raptor Research 39:417-428.       pdf

Bildstein, K.L. 2004. Raptor migration in the Neotropics: patterns, processes, and consequences. Ornitologia Neotropical 15 (suppl.):83-89.       pdf

Bildstein, K. 2004. Hydrophobic migrants. Hawk Mountain News 100:9-11.

Katzner, T., S. Robertson, B. Robertson, J. Klucsarits, K. McCarty, and K. Bildstein. 2005. Results from a long-term nest-box program for American Kestrels: implications for improved population monitoring and conservation. Journal of Field Ornithology 76:217-226.       pdf

McCarty, K., and K.L. Bildstein. 2005. Using autumn hawk watch to track raptor migration and to monitor populations of North American birds of prey. Pp. 718-725 in C.J. Ralph and T.D. Rich (eds.), Bird conservation implementation and integration in the Americas: proceedings of the Third International Partners in Flight Conference. 2002 March 20-24; Asilomar, California, Volume 1 and 2. U.S. Dept. of Agriculture, Forest Service, Pacific Southwest Research Station, Fresno, CA.       pdf

DeCandido, R., C. Nualsri, D. Allen, and K.L. Bildstein. 2004. Autumn 2003 raptor migration at Chumphon, Thailand: a globally significant migration watch site. Forktail 20:49-54.       pdf

Bildstein, K. L., and E. Iñigo-Elias. Raptors. 2003. In Wildlife Spectacles. Conservation International, Washington, D. C.

Katzner, T., A. Gavashelishvili, S. Sklyarenko, M. McGrady, J. Shergalin, and K. Bildstein. 2004. Populations and conservation status of Griffon Vultures in the former Soviet Union. Pp. 235-240 in R.D. Chancellor and B.-U. Meyburg (eds.). Raptors worldwide: Proceedings of the VI World Conference on Birds of Prey and Owls, Budapest, Hungary, 18-23 May 2003. World Working Group on Birds of Prey, Berlin, and MME/BirdLife Hungary, Budapest.

Rodríguez-Santana, F., L. Melian-Hernández, M. Martell, and K.L. Bildstein. 2003. Cuban raptor-migration counts in 2001. Journal of Raptor Research 37:330-333.       pdf

Yosef, R., L. Fornasari, P. Tryjanowski, M.J. Bechard, G.S. Kaltenecker, and K. Bildstein. 2003. Differential spring migration of adult and juvenile Levant Sparrowhawks (Accipiter brevipes) through Eilat, Israel. Journal of Raptor Research 37:31-36.       pdf

Ardia, D., D.M. Bird, J. Smallwood, J. Mason, M. Maurer, and K. Bildstein. 2002. (Abstract) Are Cooper's Hawks reducing American Kestrel populations by predation? P. 373 in Program of Third North American Ornithological Conference, New Orleans, LA.

Yosef, R., P. Tryjanowski, and K.L. Bildstein. 2002. Spring migration of adult and immature buzzards (Buteo buteo) through Eilat, Israel: timing and body size. Journal of Raptor Research 36:115-120.       pdf

McCarty, K., and K. Bildstein. 2001. Spring raptor migration summary 2001. Pennsylvania Birds 15:53-56.

Bildstein, K. 2002. (Abstract) Raptor migration in the Neotropics: what we know and what we do not. Pp. 54, 115 in Conference on Neotropical Raptorial Birds and Symposium on the Harpy Eagle. Fondo Peregrino, Panama City, Panama.

Bildstein, K. 2002. (Abstract) Conservation status of migratory raptors in the Neotropics. Pp. 57-58 in Conference on Neotropical Raptorial Birds and Symposium on the Harpy Eagle. Fondo Peregrino, Panama City, Panama.

Bildstein, K., and M. Miller. 2002. (Abstract) Using migration watchsite counts to track long-term shifts in raptor diversity in northeastern North America, 1936-1999. P. 141 in R. Yosef, M.R. Miller, and D. Pepler (eds.), Raptors in the new millenium. International Birding & Research Center in Eilat, Eilat, Israel.

Bildstein, K.L., F. Rodriguez Santana, L.O. Melian, and M. Martell. 2002. A new migration route for Swallow-tailed Kite Elanoides forficatus. Cotinga 18:93-95.

Miller, M.W., E.M. Greenstone, W. Greenstone, and K.L. Bildstein. 2002. Timing and magnitude of Broad-winged Hawk migration at Montclair Lookout, New Jersey, and Hawk Mountain Sanctuary, Pennsylvania. Wilson Bulletin 114:479-484.       pdf

Porras-Penaranda, P. and K. Bildstein. 2002. (Abstract) The world's third million-raptor watchsite: results of first full-season autumn and spring raptor-migration counts in Talamanca, Costa Rica. Pp. 55, 116-117 in Program of the Conference on Neotropical Raptors and Symposium on the Harpy Eagle. Fondo Peregrine, Panama City, Panama.

Rodríguez Santana, F. K. Bildstein, and M. Martell. 2002. (Abstract) Osprey migration in Cuba. Pp. 55-56 in Conference on Neotropical Raptors and Symposium on the Harpy Eagle. Fondo Peregrino, Panama City, Panama.

Katzner, T.E., S. Sklyarenko, A. Gavashelishvili, M. McGrady, K. Bildstein, F.E. Wiley, H.F. Cantrell, W.W. Bowerman, and W.C. Bridges. 2002. (Abstract) Abundance and conservation status of vultures in the former Soviet Union. P. 449 in Program of the Third North American Ornitholical Conference, New Orleans, LA.

Rodríguez Santana, F., M. Martell, and K. L. Bildstein. 2002. Highest single-day count of migrating Ospreys (Pandion haliaetus) for Cuba and the insular Caribbean. Pitírre 15: 127-128.

Ardia, D.R., and K.L. Bildstein. 2001. Sex-related differences in habitat use in wintering American Kestrels. Auk 118:746-750.       pdf

Leshem, Y., K. Bildstein, and D. Alon. 2002. (Abstract) A new concept of regional and global raptor migration surveys. P. 34 in R. Yosef, M.R. Miller, and D. Pepler (eds.), Raptors in the new millenium: Proccedings of the Joint Meeting of the Raptor Research Foundation and the World Working Group on Birds of Prey and Owls. International Birding & Research Center in Eilat, Eilat, Israel.

Bildstein, K.L. 2001. (Review of) Harriers of the world: their behaviour and ecology, by R.E. Simmons. Journal of Raptor Research 35:171-172.

Bildstein, K.L. 2001. Why migratory birds of prey make great biological indicators. PP. 169-179 in K.L. Bildstein and D. Klem, Jr. (eds.).,, Hawkwatching in the Americas. Hawk Migration Association of America, North Wales, PA.       pdf

Bildstein, K.L. 2001. Raptors as vermin: a history of human attitudes towards Pennsylvania's birds of prey. Endangered Species Update 18:124-128.

Bildstein, K. 2001. Raptor 101: answers to questions about birds of prey. HMANA Hawk Migration Studies 27:15-20.

Bildstein, K.L. 2001. (Review of) A photographic guide to North American raptors, by Brian K. Wheeler and William S. Clark. Auk 118:271-272.       pdf

Bildstein, K. L., and D. Klem, Jr. (eds.). 2001. (Book) Hawkwatching in the Americas: Proceedings of the 25th Anniversary Meeting of the Hawk Migration Association of North America. Hawk Migration Association of North America, North Wales, PA.

DeCandido, R., D. Allen, and K.L. Bildstein. 2001. The migration of Steppe Eagles (Aquila nipalensis) and other raptors in central Nepal, Autumn 1999. Journal of Raptor Research 35:35-39.       pdf

Bildstein, K.L., and J.Zalles. 2001. Raptor migration along the Mesoamerican Land Corridor. Pp. 119-136 in K.L. Bildstein and D. Klem, Jr. (eds.), Hawkwatching in the Americas. Hawk Migration Association of North America, North Wales, PA.

McCarty, K., and K.L. Bildstein. 2001. Autumn raptor migration summary 2001. Pennsylvania Birds 14:218-224.

Rodríguez, F, M. Martell, P. Nye, and K. L. Bildstein. 2001. Osprey migration through Cuba. Pp. 107-117 in: K. L. Bildstein, and D. Klem, Jr. (eds.), Hawk-watching in the Americas. Hawk Migration Association of North America, North Wales, PA.

Bildstein, K.L. 2000. (Review of) First Symposium on Steller's and White-tailed Sea-eagles in East Asia, edited by M. Ueta and M.J. McGrady. Journal of Raptor Research 35:77-78.

Bildstein, K.L., and R.A. Compton. 2000. Mountaintop science: the history of conservation ornithology at Hawk Mountain Sanctuary. Pp. 153-181 in W.E. Davis, Jr., and J.A. Jackson (eds.), Contributions to the history of North American ornithology. Vol. II. Memoirs of the Nuttall Ornithological Club no. 13.

Bildstein, K.L., and K. Meyer. 2000. Sharp-shinned Hawk (Accipiter striatus). In A. Poole and F. Gill (eds.), Birds of North America. Academy of Natural Sciences of Philadelphia, Philadelphia, PA, and American Ornithologists' Union, Washington, D.C.

Bildstein, K.L., and M. Saborio. 2000. Spring migration counts of raptors and New World vultures in Costa Rica. Ornitologica Neotropica 11:197-205.       pdf

Bildstein, K.L., J. Zalles, J. Ottinger, and K. McCarty. 2000. Conservation biology of the world's migratory raptors: status and strategies. Pp. 573-590 in R.D. Chancellor and B.-U. Meyburg (eds.), Raptors at risk. World Working Group on Birds of Prey, Berlin, and Hancock House, Blaine, WA.       pdf

Ottinger, J., and K.L. Bildstein. 2000. Autumn raptor migration summary 1999. Pennsylvania Birds 13:190-196.

Ottinger, J., and K.L. Bildstein. 2000. Spring raptor migration summary 2000. Pennsylvania Birds 14:94-96.

Valdez, U., S. Robertson, B. Robertson, and K.L. Bildstein. 2000. Nestbox use by American Kestrels (Falco sparverius) and European Starlings (Sturnus vulgaris) in eastern Pennsylvania. Pennsylvania Birds 14:150-153.       pdf

Zalles, J.I., and K.L. Bildstein. 2000. (Book) Raptor watch: a global directory of raptor migration site: a global directory of raptor migration sites. Birdlife Conservation Series no. 9. BirdLife International, Camridge, UK.

Verdoorn, G.H., K.L. Bildstein, and S. Ellis. 2000. Selected African Falconiformes conservation assessment and management plan. IUCN/SSC Conservation Breeding Specialist Group. Apple Valley, MN.       pdf

Bildstein, K.L. 1999. In memoriam: Frances Hamerstrom, 1907-1998. Auk 116:1122-1124.       pdf

Bildstein, K.L. 1999. Racing with the sun: the forced migration of the Broad-winged Hawk. Pp. 79-102 in K.P. Able (ed.), Gatherings of angels: migrating birds and their ecology. Cornell University Press, Ithaca, NY.

Bildstein, K.L., J. Zalles, and J. Ottinger. 1999. (Abstract) Moving targets: using migration watchsites to monitor populations of the world's migratory raptors. P. 19 in Program of the 3rd Eurasian Conference of the Raptor Research Foundation, Mikulov, Czech Republic, 21-26 September 1999.

Castaño, A.M., and K.L. Bildstein. 1999. Hawks Aloft Worldwide: estrategia para la protección de las rapaces migratorias del mundo. Boletin SAO 10:55-64.

McCarty, K.M., M. Farhoud, J. Ottinger, L.J. Goodrich, and K.L. Bildstein. 1999. Spring migration at Hawk Mountain Sanctuary, 1969-1998. Pennsylvania Birds 13:11-15.

Bildstein, K.L. 1998. Linking raptor migration science to mainstream ecology and conservation: an ambitious agenda for the 21st century. Pp. 583-601 in R.D. Chancellor, B.-U. Meyburg, and J.J. Ferrero (eds.), Holarctic birds of prey. World Working Group on Birds of Prey, Berlin, and ADENA, Barcelona, Spain.

Bildstein, K.L. 1998. Long-term counts of migrating raptors: a role for volunteers in wildlife research. Journal of Wildlife Management 62:435-445.

Bildstein, K., W. Schelsky, J. Zalles, and S. Ellis. 1998. Conservation status of tropical raptors. Journal of Raptor Research 32:3-18.       pdf

Ardia, D.R., and K.L. Bildstein. 1997. Sex-related differences in habitat selection in wintering American Kestrels, Falco sparverius. Animal Behaviour 53:1305-1311.       pdf

Bildstein, K.L. 1997. Factors influencing short- and long-term changes in raptor migration at Hawk Mountain Sanctuary, USA, 1934-1995. Buteo 9:5-15.

Bildstein, K.L. 1997. Wading-bird science: a guide for the twenty-first century. Colonial Waterbirds 20:138-142.       pdf

Michener, W.K., E.R. Blood, K.L. Bildstein, M.M. Brinson, and L.R. Gardner. 1997. Climate change, hurricanes and tropical storms, and rising sea level in coastal wetlands. Ecological Applications 7:770-801.       pdf

Maransky, B., L. Goodrich, and K. Bildstein. 1997. Seasonal shifts in the effects of weather on the visible migration of Red-tailed Hawks at Hawk Mountain, Pennsylvania 1992-1994. Wilson Bulletin 109:246-252.       pdf

Wiehn, J., E. Korpimäki, K.L. Bildstein, and J. Sorjonen. 1997. Mate choice and reproductive success in the American Kestrel: a role for blood parasites? Ethology 103:304-317.       pdf

Allen, P.E., L.J. Goodrich, and K.L. Bildstein. 1996. Within- and among-year effects of cold fronts on migrating raptors at Hawk Mountain, Pennsylvania, 1934-1991. Auk 113:329-338.       pdf

Atkinson, E.C., L.J. Goodrich, and K.L. Bildstein. 1996. A temporal field guide to autumn raptor migration at Hawk Mountain Sanctuary, Pennsylvania. Pennsylvania Birds 10:134-137.       pdf

Bildstein, K., W. Schelsky, and J. Zalles. 1996. (Abstract) Conservation status of tropical raptors. Pp. 69-70 in M. Collopy and M. Lambertini (eds.), 2nd International Conference on Raptors. Raptor Research Foundation, Boise, ID.

Bryan, A.L., Jr., T.M. Murphy, K.L. Bildstein, I.L. Brisbin, Jr., and J.J. Mayer. 1996. Use of reservoirs and other artifical impoundments by Bald Eagles in South Carolina. Pp. 258-298 in D.M. Bird, D.E. Varland, and J.J. Negro (eds.), Raptors in human landscapes. Academic Press, San Diego, CA.

Frederick, P.C., K.L. Bildstein, B. Fleury, and J. Ogden. 1996. Conservation of large, nomadic populations of White ibises (Eudocimus albus) in the United States. Conservation Biology 10:203-216.

Goodrich, L.J., and K.L. Bildstein. 1996. Within- and among-year effects of cold fronts on migrating raptors at Hawk Mountain, Pennsylvania; 1934-1991. Auk 113:329-338.

MacWhirter, R.B., and K.L. Bildstein. 1996. Northern Harrier (Circus cyaneus). In A. Poole and F. Gill (eds.), Birds of North America no. 210. Academy of Natural Sciences of Philadelphia, Philadelphia, PA, and American Ornithologists' Union, Washington, D.C.

Allen, P.E., L.J. Goodrich, and K.L. Bildstein. 1995. Hawk Mountain's million-bird database. Birding 27:25-32.

Viverette, C.B., S. Struve, L.J. Goodrich, and K.L. Bildstein. 1996. Decreases in migrating Sharp-shinned Hawks (Accipiter striatus) at traditional raptor-migration watch sites in eastern North America. Auk 113:32-40.       pdf

Goodrich, L. J., and K. L. Bildstein. 1995. Forest fragmentation and bird habitats, hawk shooting, and Peregrine Falcon. Pages 287-288, 343, and 514-515 in R. Paehlke (ed.), Conservation and environmentalism: an encyclopedia. Garland, New York.

Bildstein, K.L. 1993. Age-related differences in the flocking and foraging behavior of White Ibises in a South Carolina salt marsh. Colonial Waterbirds 6:45-53.

Bildstein, K.L. 1995. (Review of) Trends in geographic variation of Cooper's Hawk and Northern Goshawk in North America: a multivariate analysis, by W.H. Whaley and C.M. White. Wilson Bulletin 107:770-771.

Bildstein, K. L., J. J. Brett, L. J. Goodrich, and C. Viverette. 1995. Hawks Aloft Worldwide: networking to protect the world's migrating birds of prey and their migratory habitats. Pp. 504-516 in D. Saunders et al. (eds.), Nature Conservation 4: the role of networks. Surrey Beatty & Sons Pty Ltd, Chipping Norton, New South Wales, Australia.

Bildstein, K.L., J. Puschock, and L.J. Goodrich. 1995. (Abstract) Autumn migration studies of Northern Harriers (Circus cyaneus), Sharp-shinned Hawks (Accipiter striatus), Broad-winged Hawks (Buteo platypterus), and Golden Eagles (Aquila chrysaetos) at Hawk Mountain Sanctuary, 1946-1991. P. 6 in Program of the Annual Meeting of the Raptor Research Foundation, 1995.

Bildstein, K.L., and J.I. Zalles. 1995. (Book) Raptor migration watch-site manual. Hawk Mountain Sanctuary Association, Kempton, PA.

Bildstein, K.L., and J. Zalles. 1995. Moving targets -- the science and conservation of migrating raptors in the Western Hemisphere. Pp. 97-108 in Y. Leshem, E. Lachman, and P. Berthold (eds.), Migrating birds know no boundaries: scientific and educational aspects of migrating bird conservation. Torgos, Tel Aviv, Israel.

Bunn, A.G., W. Klein, and K.L. Bildstein. 1995. Time-of-day effects on the numbers and behavior of non-breeding raptors seen on roadside surveys in eastern Pennsylvania. Journal of Field Ornithology 66:544-552.       pdf

Gawlik, D., and K. Bildstein. 1995. Differential habitat use by sympatric Loggerhead Shrikes and American Kestrels in South Carolina. Proceedings of the Western Foundation of Vertebrate Zoology 6:163-166.

Gawlik, D., and K.L. Bildstein. 1995. Differential habitat use by sympatric Loggerhead Shrikes and American Kestrels in South Carolina. Proceedings of the Western Foundation of Vertebrate Zoology 6:163-166.       pdf

Bildstein, K.L., J.J. Brett, L. Goodrich, and C. Viverette. 1994. (Abstract) Hawks Aloft Worldwide: a cooperative strategy for protecting migrating raptors in the Americas. Journal of Raptor Research 28:68.

Bryan, A.L., Jr., T.M. Murphy, K.L. Bildstein, I.L. Brisbin, Jr., and J.J. Mayer. 1994. (Abstract) Use of reservoirs and other artifical impoundments by Bald Eagles in the southeastern United States. Journal of Raptor Research 228:45.

Goodrich, L. J., J. Brett, C. Viverette, and K. L. Bildstein. 1994. An invitation to join Hawks Aloft Worldwide: Hawk Mountain's raptor migration atlas project. Journal of Hawk Migration Studies 19(2):7-10.

Negro, J.J., K.L. Bildstein, and D.M. Bird. 1994. Effects of food deprivation and handling stress on fault bar formation in nestling American Kestrels Falco sparverius. Ardea 82:263-267.       pdf

Bildstein, K.L. 1993. (Book) White Ibis: wetland wanderer. Smithsonian Institution Press, Washington, D.C.

Bildstein, K.L., J. Brett, L. Goodrich, and C. Viverette. 1993. Shooting galleries. American Birds 47:38-43.       pdf

Brett, J. J., and K. Bildstein. 1993. Pp. 367-370 in E.T. Wilson (ed.), An international scheme for monitoring raptor populations at migration sites. Proceedings of the Eighth Pan African Ornithological Congress, Musee Royal de Afrique Centrale, Tervuren, Belgium.        pdf

Brett, J., L. Goodrich, C. Viverette, and K.L. Bildstein. 1993. (Abstract) Introducing the International Raptor Migration Atlas Project (IRMAP). Journal of Raptor Research 27:65.

Gawlik, D., and K.L. Bildstein. 1993. Seasonal habitat use and abundance of Loggerhead Shrikes in South Carolina. Journal of Wildlife Management 57:352-357.       pdf

Bildstein, K.L. 1992. Causes and consequences of reversed sexual size dimorphism in raptors: the head start hypothesis. Journal of Raptor Research 26:115-123.       pdf

Frederick, P.C., and K.L. Bildstein. 1992. Foraging ecology of seven species of Neotropical ibises (Threskiornithidae) during the dry season in the llanos of Venezuela. Wilson Buleltin 104:1-21.       pdf

Bildstein, K.L., T. Bancroft, P.J. Dugan, D.H. Gordon, R.M. Erwin, E. Nol, L.X. Payne, and S.E. Senner. 1991. Approaches to the conservation of coastal wetlands in the Western Hemisphere. Wilson Bulletin 103:218-254.       pdf

Bildstein, K.L., P.C. Frederick, and M.G. Spalding. 1991. Feeding patterns and aggressive behavior in juvenile and adult American Flamingos. Condor 93:916-925.       pdf

Bildstein, K.L., W. Post, J. Johnston, and P. Frederick. 1990. Freshwater wetlands, rainfall, and the breeding ecology of White Ibises in coastal Southg Carolina. Wilson Bulletin 102:84-98.       pdf

De Santo, T.L., S.G. McDowell, and K.L. Bildstein. 1990. Plumage and behavioral development of nestling White Ibises. Wilson Bulletin 102:226-238.       pdf

Gawlik, D.E., and K.L. Bildstein. 1990. Methods of estimating nonbreeding populations of open habitat diurnal raptors in the Southeast. National Wildlife Federation Scientific & Technical Series 14:214-217.

Gawlik, D.E., and K.L. Bildstein. 1990. Reproductive success and nesting habitat of Loggerhead Shrikes in north-central South Carolina. Wilson Bulletin 102:37-48.       pdf

Johnston, J.W., and K.L. Bildstein. 1990. Dietary salt as a physiological constraint in White Ibis breeding in an estuary. Physiological Zoology 63:190-207.

Bildstein, K.L., S.G. McDowell, and I.L. Brisbin. 1989. Consequences of sexual dimorphism in Sand Fiddler Crabs, Uca pugilator: differential vulnerability to avian predation. Animal Behaviour 37:133-139.

Gawlik, D.E., M.E. Hostetler, and K.L. Bildstein. 1988. Naphthalene moth balls do not deter mammalian predators at Red-winged Blackbird nest. Journal of Field Ornithology 59:189-191.

Bildstein, K.L. 1987. (Book) Behavioral ecology of Red-tailed Hawks (Buteo jamaicensis), Rough-legged Hawks (Buteo lagopus), Northern Harriers (Circus cyaneus), and American Kestrels (Falco sparverius). Ohio Biological Survey Biological Notes 18:1-53.

Bildstein, K.L. 1987. Energetic consequences of sexual size dimorphism in White Ibises (Eudocimus albus). Auk 104:771-776.       pdf

Collopy, M.W., and K.L. Bildstein. 1987. Foraging behavior of Northern Harriers wintering in southeastern salt and freshwater marshes. Auk 104:11-16.       pdf

Petit, D.R., and K.L. Bildstein. 1987. Effect of group size and location within the group on the foraging behavior of White Ibises. Condor 89:602-609.

Dame, R., T. Chrzanowski, K. Bildstein, B. Kjerfve, H. McKellar, D. Nelson, J. Spurrier, S. Stancyk, H. Stevenson, J. Vernberg, and R. Zingmark. 1986. The outwelling hypothesis and North Inlet, South Carolina. Marine Progress-Progress Series 33:217-229.

Petit, D.R., and K.L. Bildstein. 1986. Development of formation flying in juvenile White Ibises (Eudocimus albus). Auk 103:244-246.       pdf

Bildstein, K.L., and M.W. Collopy. 1985. Escorting flight and agonistic interactions in wintering Northern Harriers. Condor 87:398-401.       pdf

Hovis, J., T.D. Snowman, V.L. Cox, R. Fay, and K.L. Bildstein. 1985. Nesting behavior of Peregrine Falcons in West Greenland during the nesting period. Raptor Research 19:15-19.

Bildstein, K.L., W.S. Clark, D.L. Evans, M. Field, L. Soucy, and E. Henckel. 1984. Sex and age differences in fall migration of Northern Harriers. Journal of Field Ornithology 55:143-150.       pdf

Bildstein, K.L. 1983. Why White-tailed Deer flag their tails. American Naturalist 121:709-715.

Bildstein, K.L. 1982. Responses of Northern Harriers to mobbing passerines. Journal of Field Ornithology 53:7-15.       pdf

Bildstein, K.L. 1982. Prey concealment by American Kestrels. Raptor Research 16:83-88.       pdf

Bildstein, K.L., and K.G. Beal. 1982. Responses of captive Meadow Voles to flyovers of a Northern Harrier and an American Kestrel. Ohio Journal oif Science 82:238-241.       pdf

Bildstein, K.L., R.L. Christy, and P. DeCoursey. 1982. Energy flow through a South Carolina salt-marsh shorebird community. Wader Studies Group Bulletin 34:35-37.       pdf

Bildstein, K.L. 1980. Corn cob manipulation in Northern Harriers. Wilson Bulletin 92:128-130.       pdf

Bildstein, K.L. 1980. Adult Brown Pelican robs Great Blue Heron of fish. Wilson Bulletin 92:122-123.       pdf

Bildstein, K.L., and T.C. Grubb, Jr. 1980. Spatial distributions of American Kestrels and Loggerhead Shrikes wintering sympatrically in eastern Texas. Raptor Research 14:90-91.       pdf

Bildstein, K.L., and T.C. Grubb, Jr. 1980. Roadside raptor count in eastern Texas. Bulletin of the Texas Ornithological Society 13:20-22.

Bildstein, K.L., and F. Hamerstrom. 1980. Age and sex differences in the size of Northern Harriers. Journal of Field Ornithology 51:356-360.       pdf

Bildstein, K.L. 1979. Behavior of a pair of Northern Harriers on the day of nest abandonment. Inland Bird Banding 51:63-65.

Bildstein, K.L. 1979. Trends in the number of diurnal raptors seen on recent North and South Carolina Christmas Bird Counts. Chat 43:82-83.

Bildstein, K.L. 1979. Fluctuations in the number of Northern Harriers (Circus cyaneus hudsonius) at communal roosts in south central Ohio. Raptor Research 13:40-46.       pdf

Bildstein, K.L., and D.P. Althoff. 1979. Responses of White-footed Mice and Meadow Voles to flyovers of an aerial predator silhouette. Ohio Academy of Sciences 79:212-217.       pdf

Bildstein, K.L., and D.M. Forsyth. 1979. Effects of dietary dieldrin on behaviour of White-footed Mice (Peromyscus leucopus) towards an avian predator. Bulletin of Enviornmental Contamination and Toxicology 21:93-97.

Bildstein, K.L.. 1978. Behavioral ecology of Red-tailed Hawks (Buteo jamaicensis), Rough-legged Hawks (B. lagopus), Northern Harriers (Circus cyaneus, American Kestrels (Falco sparverius), and other raptorial birds wintering in south-central Ohio. Ph.D. dissertation, Ohio State University, Columbus, OH.       pdf

Bildstein, K.L. 1976. Behavior of wintering Northern Harriers (Circus cyaneus hudsonius) and other raptorial birds at communal roosts in south central Ohio. M.Sc. thesis, Ohio State University, Columbus, OH.       pdf

Bildstein, K.L., and M. Ashby. 1975. Short-eared Owl robbed Marsh Hawk of prey. Auk 92:807-808.       pdf



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