I believe that you wish that it were true but it just isn't. Even if it were, however (which it isn't) would saving raptors been worth the millions upon millions upon millions of human deaths that have resulted from the ban on DDT?
Here are some DDT facts as it relates to eagles.
Bald eagles were reportedly threatened with extinction in 1921 -- 25 years before widespread use of DDT.
[Van Name, WG. 1921. Ecology 2:76]
Alaska paid over $100,000 in bounties for 115,000 bald eagles between 1917 and 1942.
[Anon. Science News Letter, July 3, 1943]
The bald eagle had vanished from New England by 1937.
[Bent, AC. 1937. Raptorial Birds of America. US National Museum Bull 167:321-349]
After 15 years of heavy and widespread usage of DDT, Audubon Society ornithologists counted 25 percent more eagles per observer in 1960 than during the pre-DDT 1941 bird census.
[Marvin, PH. 1964 Birds on the rise. Bull Entomol Soc Amer 10(3):184-186; Wurster, CF. 1969 Congressional Record S4599, May 5, 1969; Anon. 1942. The 42nd Annual Christmas Bird Census. Audubon Magazine 44:1-75 (Jan/Feb 1942; Cruickshank, AD (Editor). 1961. The 61st Annual Christmas Bird Census. Audubon Field Notes 15(2):84-300; White-Stevens, R.. 1972. Statistical analyses of Audubon Christmas Bird censuses. Letter to New York Times, August 15, 1972]
No significant correlation between DDE residues and shell thickness was reported in a large series of bald eagle eggs.
[Postupalsky, S. 1971. (DDE residues and shell thickness). Canadian Wildlife Service manuscript, April 8, 1971]
Thickness of eggshells from Florida, Maine and Wisconsin was found to not be correlated with DDT residues.
Data from Krantz, WC. 1970. Pesticides Monitoring Journal 4(3):136-140.
State Thickness (mm) DDE residue (ppm)
Florida 0.50 About 10
Maine 0.53 About 22
Wisconsin 0.55 About 4
U.S. Fish and Wildlife Service biologists fed large doses of DDT to captive bald eagles for 112 days and concluded that "DDT residues encountered by eagles in the environment would not adversely affect eagles or their eggs."
[Stickel, L. 1966. Bald eagle-pesticide relationships. Trans 31st N Amer Wildlife Conference, pp.190-200]
Wildlife authorities attributed bald eagle population reductions to a "widespread loss of suitable habitat", but noted that "illegal shooting continues to be the leading cause of direct mortality in both adult and immature bald eagles."
[Anon.. 1978. U.S. Fish and Wildlife Service, Endangered Species Tech Bull 3:8-9]
Every bald eagle found dead in the U.S., between 1961-1977 (266 birds) was analyzed by U.S. Fish and Wildlife Service biologists who reported no adverse effects caused by DDT or its residues.
[Reichel, WL. 1969. (Pesticide residues in 45 bald eagles found dad in the U.S. 1964-1965). Pesticides Monitoring J 3(3)142-144; Belisle, AA. 1972. (Pesticide residues and PCBs and mercury, in bald eagles found dead in the U.S. 1969-1970). Pesticides Monitoring J 6(3): 133-138; Cromartie, E. 1974. (Organochlorine pesticides and PCBs in 37 bald eagles found dead in the U.S. 1971-1972). Pesticides Monitoring J 9:11-14; Coon, NC. 1970. (Causes of bald eagle mortality in the US 1960-1065). Journal of Wildlife Diseases 6:72-76]
U.S. Fish and Wildlife Service biologists linked high intake of mercury from contaminated fish with eagle reproductive problems.
[Spann, JW, RG Heath, JF Kreitzer, LN Locke. 1972. (Lethal and reproductive effects of mercury on birds) Science 175:328- 331]
Shooting, power line electrocution, collisions in flight and poisoning from eating ducks containing lead shot were ranked by the National Wildlife Federation as late as 1984 as the leading causes of eagle deaths.
[Anon. 1984. National Wildlife Federation publication. (Eagle deaths)]
DDT as it relates to falcons.
The decline in the U.S. peregrine falcon population occurred long before the DDT years.
[Hickey JJ. 1942. (Only 170 pairs of peregrines in eastern U.S. in 1940) Auk 59:176; Hickey JJ. 1971 Testimony at DDT hearings before EPA hearing examiner. (350 pre- DDT peregrines claimed in eastern U.S., with 28 of the females sterile); and Beebe FL. 1971. The Myth of the Vanishing Peregrine Falcon: A study in manipulation of public and official attitudes. Canadian Raptor Society Publication, 31 pages]
Peregrine falcons were deemed undesirable in the early 20th century. Dr. William Hornaday of the New York Zoological Society referred them as birds that "deserve death, but are so rare that we need not take them into account."
[Hornaday, WT. 1913. Our Vanishing Wild Life. New York Zoological Society, p. 226]
Oologists amassed great collections of falcon eggs.
[Peterson, RT. 1948. Birds Over American, Dodd Mead & Co., NY, pp 135-151; Rice, JN. 1969. In Peregrine Falcon Populations, Univ. Of Wisconsin Press, pp 155-164; Berger, DD. 1969. In Peregrine Falcon Populations, Univ. Of Wisconsin Press, pp 165-173]
The decline in falcons along the Hudson River was attributed to falconers, egg collectors, pigeon fanciers and disturbance by construction workers and others.
[Herbert, RA and KG Herbert. 1969. In Peregrine Falcon Populations, Univ. Of Wisconsin Press, pp 133- 154. (Also in Auk 82: 62-94)]
The 1950's and 1960's saw continuing harassment trapping brooding birds in their nests, removing fat samples for analysis and operating time-lapse cameras beside the nests for extended periods of time), predation and habitat destruction.
[Hazeltine, WE. 1972. Statement before Secretary of State's Advisory Committee on United Nations Conference on the Human Environment, March 16, 1972; Enderson, JH and DD Berger. 1968. (Chlorinated hydrocarbons in peregrines from Northern Canada). Condor 70:149-153; Enderson, JH.. 1972. (Time lapse photography in peregrine nests) Living Bird 11: 113- 128; Risebrough, RW. 1970. (Organochlorines in peregrines and merlins migrating through Wisconsin). Canadian Field-Naturalist 84:247-253]
Changes in climate (higher temperatures and decreasing precipitation) were blamed for the gradual disappearance of peregrines from the Rocky Mountains.
[Nelson, MW. 1969. Peregrine Falcon Populations, pp 61-72]
Falconers were blamed for decimating western populations.
[Herman, S. 1969. Peregrine Falcon Populations, University of Wisconsin Press]
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