California condor conservationists are among those pushing for a statewide ban on lead ammunition in California. Some of the critically endangered birds are dying of lead poisoning. The Los Angeles Zoo has been breeding condors in captivity for decades to restore the species' population. Now a major part of their job is treating birds who've dined on lead-tainted animal remains in the wild. They — along with a bill making its way through the Legislature — identify lead bullets as the top condor threat. But hunters and shooters question lead's environmental impact. And they say a ban would leave them with few affordable, convenient options.