American Ornithologists' Union. 1998.
Check-list of North American birds: 7th edition
American Ornithologists' Union. Allen Press, Lawrence, Kansas. 829 pgs.
(ISBN 1-891276-00-X)

Araya M., Braulio and Guillermo Millie H. 1998.
Guía de campo de las aves de Chile
Editorial Universitaria. Santiago de Chile. 406 pgs.
(ISBN 956-11-1236-1) (Spanish)

Barbour, Thomas. 1923.
The Birds of Cuba - Memoirs of the Nuttall ornithological club. no. VI
Nuttall Ornithological Club. Cambridge, Massachusetts. 141 pgs.

Barbour, Thomas. 1943.
Cuban Ornithology - Memoirs of the Nuttall Ornithological Club, no. 9
Nuttall Ornithological Club. Cambridge, Massachusetts. 144 pgs.

Barlow, Clive and Tim Wacher. 1997.
A field guide to birds of the Gambia and Senegal
Yale University Press. New Haven and London. 400 pgs.
(ISBN: 0-300-07454-9)

Beehler, Bruce M., Thane K. Pratt, and Dale A. Zimmerman. 1986.
Birds of New Guinea
Princeton University Press. Princeton, New Jersey. 296 pgs.
(ISBN 0-691-02394-8 and 0-691-08385-1)

Bohlen, H. David. 1989.
The birds of Illinois
Indiana University Press. Bloomington and Indianapolis. Pgs 12-13.

Bond, James. 1947.
Field guide to birds of the West Indies
The Macmillan Company. New York. Pg 20.

Bond, James. 1971.
Birds of the West Indies
Houghton Mifflin company. Boston. 256 pgs.

Brzorad, John N., Alan D. Maccarone and Kevin J. Conley. 2004.
Foraging energetics of Great Egrets and Snowy Egrets
Journal of Field Ornithology. Vol 75. No 3. Pgs 266-280.

Clancey, P. A. 1964.
The Birds of Natal and Zululand
Oliver & Boyd. Edinburgh and London. 511 pgs.

Clements, James F. 2000.
Birds of the World: A Checklist: Fifth Edition.
Ibis Publishing Company. Vista, California. 867 pgs.
(ISBN: 0-934797-16-1)

Custer, Christine M. and Joan Galli. 2002.
Feeding Habitat Selection by Great Blue Heron and Great Egrests Nesting in East Central Minnesota
Waterbirds. Vol 25. No 1. Pgs 115-124.

Custer, Christine M., Sarah A. Suárez and Douglas A. Olsen. 2004.
Feeding Habitat Characteristics of the Great Blue Heron and Great Egret Nesting Along the Upper Mississippi River, 1995-1998
Waterbirds. Vol 27. No 4. Pgs 454-468.

DeSante, David F. and David G. Ainley. 1980.
The Avifauna of the South Farallon Islands, California
Studies in Avian Biology No. 4. A Publication of the Cooper Ornithological Society.
Allen Press, Lawrence, Kansas. 104 pgs.

De Schauensee, Rodolphe Meyer and William H. Phelps, Jr. 1978.
A guide to the Birds of Venezuela
Princeton University Press. Princeton, New Jersey. 424 pgs.
(ISBN: 0-691-08205-7, LC: QL689.V4D47)

Dickinson, Edward C. (Editor). 2003.
The Howard & Moore Complete Checklist of the Birds of the World. Third Edition.
Princeton University Press, Princeton, New Jersey. 1039 pgs. (ISBN: 0-691-11701-2)

Etchécopar, R. D. and François Hüe. 1967.
The Birds of North Africa from the Canary Islands to the Red Sea
Translated to English from French by P. A. D. Hollom.
Oliver & Boyd. Edinburgh and London. 612 pgs.

Franganillo Balboa, Pelegrín, S. J. 1941.
Las Aves de Cuba
Cultural S. A. Habana, Cuba. 214 pgs. (Spanish)

Garrido, Orlando H. and Arturo Kirkconnell. 2000.
Field Guide to the Birds of Cuba
Comstock Publishing Assosiates. Ithaca, New York. 253 pgs.

González, José A. 1999.
Effects of Harvesting of Waterbirds and Their Eggs by Native People in the Northeastern Peruvian Amazon
Waterbirds. Vol 22. No 2. Pgs 217-224.

Hancock, James, and James Kushlan. 1984.
The herons handbook
Harper & Row, Publishers, Inc. New York, New York. 288 pgs.
(ISBN 0-06-015331-8)

Heather, Barrie and Hugh Robertson. 1997.
The field guide to the birds of New Zealand
Oxford University Press. Oxford, New York, Tokyo. 432 pgs.
(ISBN: 0 19 850146 3 and 0 19 850145 5)

Hilty, Steven L. and William L. Brown. 1986.
A guide to the Birds of Colombia
Princeton University Press. Princeton. New Jersey. 836 pgs.
(ISBN: 0-691-08371-1 and 0-691-08372-X)

Kasner, Andrew C. and Thomas P. Dixon. 2003.
Aerial Foraging Over Open Water by Great Egrets and Snowy Egrets on Schooling Freshwater Fish
Wilson Bulletin. Vol 115. No 2. Pgs 199-200.

Koepcke, Maria. 1970.
The Birds of the Department of Lima, Peru
Livingston Publishing Company. Wynnewood, Pennsylvania. 144 pgs.
(ISBN: 0-87098-029-7)

Maccarone, Alan D. and John N. Brzorad. 2002.
Foraging Patterns of Breeding Egrets at Coastal and Interior Locations
Waterbirds. Vol 25. No 1. Pgs 1-7.

MacKinnon, John and Karen Phillipps. 1993.
A Field Guide to the Birds of Borneo, Sumatra, Java and Bali
Oxford University Press. Oxford, New York, Tokyo. 491 pgs.
(ISBN: 0 19 854035 3)

Mayr, Ernst and Jared Diamond. 2001.
The Birds of Northern Melanesia: Speciation, Ecology, & Biogeography
Oxford University Press. 492 pgs.
(ISBN 0-19-514170-9, LC: QL691.B52 M38 2001)

McNeil, Raymond, Pierre Drapeau and Raymond Pierotti. 1993.
Nocturnality in Colonial Waterbirds: Occurrence, Special Adaptations, and Suspected Benefits
in Current Ornithology Vol 10. Edited by Dennis M. Power.
Plenum Press. New York and London. Pgs 187-246.
(ISBN: 0-306-44282-5)

Melvin, Stefani L., Dale E. Gawlik and T. Scharff. 1999.
Long-term Movement Patterns for Seven Species of Wading Birds
Waterbirds. Vol 22. No 3. Pgs 411-416.

Narosky, T. and D. Yzurieta. 1989.
Guía para la identificación de las aves de Argentina y Uruguay
Vazquez Mazzini Editores. Buenos Aires, Argentina. 343 pgs. (ISBN: 950-99063-0-1). (Spanish)

Olrog, Claës Chr. 1968.
Las Aves Sudamericanas: Una guía de campo
Tomo Primero ( Pingüinos - Pájaros Carpinteros )
Universidad Nacional de Tucumán. Fundación - Instituto "Miguel Lillo". Argentina. 505 pgs. (Spanish)

Pizzey, Graham. 1994.
Birds of Australia Third printing.
Princeton University Press. Princeton, New Jersey. 460 pgs.
(ISBN 0-691-08277-4 and 0-691-08483-1)

Pratt, H. Douglas, Phillip L. Bruner, and Delwyn G. Berrett. 1987.
A field guide to the birds of Hawaii and the Tropical Pacific
Hawaii Audubon Society. Princeton University Press. Princeton, New Jersey. Pg 87.
(ISBN 0-691-08402-5 and 0-691-02399-9)

Pyle, Peter and R. Philip Henderson. 1991.
The Birds of Southeast Farallon Islands: Occurrence and Seasonal Distribution of Migratory Species
Western Birds. Vol 22. No 2. Pgs 41-84.

Raffaele, Herbert, James Wiley, Orlando Garrido, Allan Keith and Janis Raffaele. 1998.
A Guide to the Birds of the West Indies
Princeton University Press. Princeton, New Jersey. 511 pgs.

Rand, Austin L. and E. Thomas Gilliard. 1968.
Handbook of New Guinea Birds
The Natural History Press. Garden City, New York. Pg 43.

Rosenberg, Kenneth V., Robert D. Ohmart, William C. Hunter and Bertin W. Anderson. 1991.
Birds of the Lower Colorado River Valley
The University of Arizona Press. The Arizona Board of Regents. Tucson, Arizona. Página 129.
(ISBN 0-8165-1174-8)

Shirihai, Hadoram. 1996.
The Birds of Israel
Academic Press Limited. London. 692 pgs.
(ISBN 0-12-640255-8)

Shuford, W. David, Gary W. Page, Jules G. Evens and Lynne E. Stenzel. 1989.
Seasonal Abundance of Waterbirds at Point Reyes: A Coastal California Prespective
Western Birds. Vol 20. No 4. Pgs 137-265.

Sick, Helmut. 1993.
Birds in Brazil
Translated to English from the Portuguese by William Belton
Princeton University Press. Princeton, New Jersey. 703 pgs.
(ISBN: 0-691-08569-2)

Sinclair, Ian, Phil Hockey and Warwick Tarboton. 1993.
Ilustrated Guide to the Birds of Southern Africa
Princeton University Press. Princeton, New Jersey. 426 pgs.
(ISBN: 0 691 04469 4)

Smythies, Bertram E. 1968.
The birds of Borneo
Oliver & Boyd. Edinburgh and London. 593 pgs.

Stiles, Gary F. and Alexander F. Skutch. 1989.
A Guide to the Birds of Costa Rica
Comstock Publishing Associates. Ithaca, New York. 511 pgs.
(ISBN: 0-8014-2287-6 and 0-8014-9600-4)

Stockton de Dod, Annabelle. 1981.
Guía de Campo para las Aves de la República Dominicana
Editora Horizontes de América, Santo Domingo, República Dominicana. Pg 31. (Spanish)

Stotz, Douglas F., John W. Fitzpatrick, Theodore A. Parker III and Debra K. Moskovits. 1996.
Neotropical Birds: Ecology and Conservation
The University of Chicago Press. Chicago and London. 478 pgs.
(ISBN: 0-226-77629-8 and 0-226-77630-1, LC: QL685.7.N46 1996)

Voisin, Claire. 1991.
The Herons of Europe
T & A D Poyser. London. 364 pgs. (ISBN: 0 85661 063 1)

Wells, David R. 1999.
The Birds of the Thai-Malay Peninsula: Covering Burma and Thailand south of the eleventh parallel, Peninsular Malaysia and Singapore
Academic Press. London. 648 pgs. (ISBN: 0-12-742961-1)

Wetmore, Alexander. 1926.
Observations on the birds of Argentina, Paraguay, Uruguay, and Chile
Smithsonian Institution. Bulletin 133. Washington. Pgs 57-58.

Zimmerman, Dale A., Donald A. Turner and David J. Pearson. 1996.
Birds of Kenya and Northern Tanzania
Princeton University Press. Princeton, New Jersey. 740 pgs.
(ISBN: 0-691-02658-0)