Allen, R.P. 1952. The Whooping Crane. Research Report
No. 3. National Audubon Society. New York. 246 p. |
Allen, R. P., ed. 1956. A Report on the Whooping
Crane’s Northern Breeding
Grounds. Supplement to Res. Rpt. No. 3. National
Audubon Society, New
York. 60 pp. |
| Butler, R.W. (1990). Authority of the Minister
of the Environment. "Great Blue Heron".
Retrieved from: http://www.cws-scf.ec.gc.ca/hww-fap/hww-fap.cfm?ID_species=16&lang=e |
| Coulombre, D.A. (1992),. The Seaside Naturalist,
A guide to study at the Seashore. Simon & Schuster:
New York. pp 193-200. |
| Enature.com. (2000)."Nature and Wildlife
Field Guides". Retrieved from: http://www.enature.com/guides/select_Birds.asp |
International Crane Foundation. (2001). "Crane
Species: Whooping Crane" Retrieved from:
http://www.savingcranes.org/species/whooping.asp
|
| Mader, Sylvia S. 1996. Biology - 5th Ed. WCB and
Cox, G.W. 1997. Conservation Biology - 2nd ed. WCB |
| McHaffrey, D. (1999)Marietta College. "Bioaccumulation
& Biomagnificaiton". Retrieved from:
http://www.biologie.uni-hamburg.de/b-online/library/marietta/2bioma95.html |
Meine, Curt D. and George W. Archibald (Eds).
1996. The cranes: - Status
survey and conservation action plan. IUCN, Gland,
Switzerland, and
Cambridge, U.K. 294pp. Northern Prairie Wildlife
Research Center Home Page. http://www.npwrc.usgs.gov/resource/distr/birds/cranes/cranes.htm
(Version 02MAR98). |
| National Wildlife Federation. (2000). "Whooping
Crane - Big Picture". Retrieved from: http://www.nwf.org/keepthewildalive/crane/bigpicture.cfm |
| Nebraska Game and Parks Commission (2002) "Whooping
Cranes. Retrieved from: http://www.ngpc.state.ne.us/wildlife/whopcran.html |
| Patuxent Wildlife Research Center. (1998). "Laughing
Gull" . Retrieved from: http://www.pwrc.usgs.gov/bioeco/lgull.htm. |
| Robbins, C.S., Bruun, B. & Zim, H.S. (1983).
"Birds of North America". Golden Books:New
York. |
| Texas Parks & Wildlife Department. "Eastern
Brown Pelican". Retrieved from: http://www.tpwd.state.tx.us/nature/endang/birds/bpelican.htm |
| US Fish and Wildlife Services. "Great Blue
Heron". Retrieved from: http://www.fws.gov/r5cbfo/heron.htm |
| USGS (1998) "Patuxent Bird ID InfoCenter".
Retrieved from: http://www.mbr-pwrc.usgs.gov/id/framlst/framlst.html |