I don't think it's possible to say that switching to nontox for waterfowl had no impact on the eagle population. We know that eagles die from lead poisoning, and we know that eagles spend a lot of time around lakes and wetlands--where we used to shoot lots of ducks and geese with lead. And where a lot of them went unrecovered, giving the eagles plenty of ducks and geese with lead in their bodies on which to scavenge. All we do know is that since banning DDT and switching to nontox for waterfowl, eagles have made a miraculous recovery. If ingesting lead fragments is killing them today, why wouldn't ingesting lead shot have been killing them back before we stopped shooting lead at waterfowl?