Osprey eggs 3 – DDT

A dramatic decline of osprey populations between the 1940s and 1970 was caused by DDT-induced eggshell thinning.

DDT and PCBs built up in the fish the ospreys ate and made their egg shells so thin that adults crushed their progeny when they nested on them.

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Public concern over DDT can be traced back to Rachel Carson’s 1962 book Silent Spring.

DDT had a similar effect on eagle eggs, before it was banned in 1972.


About Harriett Raptor

Eight-year-old mother of five, fluent in telepathy, a possessor of genetic memory, a genius and scholar. Harriett holds the equivalent of a PhD in philosophy, biology, chemistry, physics, astronomy, and the Homo sapiens’ concept of the humanities. Her understanding of mathematics and logic are beyond Homo sapiens’ current comprehension. Harriett is a thinker, a wise osprey, especially distinguished for her expertise in the Homo sapiens problem.
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