" But what certainly seems to be an issue is scavenger birds. The condor gets all the press but all kinds of raptors end up with lead poisoning, though I don't know how much is from unrecovered animals later getting eaten by raptors or if they're exposed from something else. All I really know is that my falconer friends are ardent lead-free advocates. Since they have some skin (or rather soul) in the game, I'll trust their judgment on those issues."
I wouldn't be so trusting. All based upon a now widely discredited study done by the Peregrine Fund out of Boise. It was so bad even the Peregrine Fund withdrew it and fired the "dentist" who wrote it.
As for lead poisoning waterfowl, the Mendota Reserve (CA) lead study of the 70's that was used to ban lead shot for waterfowl was also widely discredited in the 80's It wasn't lead killing the birds, rather selenium from the drainage of irrigation water. This issue was brought forth by the California Woolgrowers Association in the late 70s as lambs were getting what is called white muscle or stiff lamb disease from selenium poisoning. The Feds finally investigated, but never did remove the lead ban.
Selenium Hazard in the Salton Sea Environment, Summary of Current Knowledge to Inform Future Science | U.S. Geological Survey
The effect of selenium (Se) toxicity on wildlife has been known for more than 50 years. The threat of Se contamination gained greater attention from federal agencies in the 1980s due to the observation of embryo deformity and mortality in birds at a National Wildlife Refuge in California. Harmful effects from Se were determined to be connected to irrigation drainage water.
Selenium Hazard in the Salton Sea Environment, Summary of Current Knowledge to Inform Future Science | U.S. Geological Survey
Condors are poisoning themselves by eating large amounts of road kill from contaminated small animals from the years of use of leaded gasoline. It has been shown that those birds dying from lead poisoning are those that scavenge along roadways. Birds that don't, don't die from lead poisoning.
The lead issue is a Trojan horse to get rid of hunting. Even the enviros refer to it as the "spotted owl" method of getting rid of something