[Einigkeit_Recht_Freiheit]

Folk wisdom has it that DDT kept their population down

I will assume you are a creationist seeing as how you are confusing science for folk wisdom. The connection between DDT and a diminishing of bird populations has got an incredibly strong scientific base and such overwhelming cirucmstantial evidence that even a California jury would have to agree. Below is from a Duke University website:

"DDT can change into many different forms that are only slightly different from the original. We call these new forms metabolites. We think that one of these metabolites, abbreviated DDE, interferes with certain reproductive enzymes in birds.

Enzymes act as helpers for certain chemical reaction. They can speed up biological processes, slow them down, etc.. In birds, certain reproductive enzymes affect how much calcium is deposited in eggshells. DDE probably gets in the way of some of these enzymes. Consequently, eggshells have less calcium, which makes them easier to break."

[hlmencken3]

LOL

I phrased it that way because I never saw the science, just heard the DDT link repeated.

Thanks for scientific confirmation.