California Condors were dying from lead poisoning, which still affects the released birds. They pick up lead from shot carcasses, and grallochs from shot deer. When the last condors were brought into captivity there was one bird in Los Angeles Zoo. He was a wild rescue called Topa-topa. I suspect Topa-topa, who will be over 50 years old may still be alive. The extinction of the louse was caused by over-zealous parasite control and is to be regretted.