[Harmless Teddy Bear]

Actually the reason the test birds laid thin shelled eggs was that they were fed a low calcium diet.

In the wild it is pretty clear that DDT had nothing to do with thin shells but that it was mercury that was causing problems.

DDT was a pesticide that did what it was suppose to do. Killed the pest and did no harm to anyone else. So, of course, it had to be destroyed.

Anything that kept more people alive was bad you see.

[gundog]

Actually the reason the test birds laid thin shelled eggs was that they were fed a low calcium diet.

Cite that study please. Birds reserve calcium in their leg bones, and draw on the reserve for making shell. They do not use dietary calcium directly.

[Smokin' Joe]

It was alleged that osprey in CT were laying eggs with shells too fragile to survive brooding. At the time the wildlife people were stealing eggs from nests in Maryland to take to CT, and losing about half of those to breakage on the way.