In more and more areas of the U.S., spring begins without the once-familiar sound of birdsong. Birds are disappearing from communities that once enjoyed seeing multitudes of migrating birds. Spraying against such things as Dutch elm disease and fire ants has destroyed birds by the thousands. Spraying for Dutch elm disease began in the 1950's, with the immediate and devastating result of the death of the robins and other birds that lived and nested in the elms. The birds were eating their usual diet of earthworms. The earthworms had, as usual, dined on the mulch of elm leaves that fell each autumn and the DDT used against the elm disease that would not wash off of the leaves. The DDT collected in the earthworms in high concentrations, so that.....
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