The article reports that California condor, Gymnogyps californianus, which is the largest and threatened wild bird in the U.S. may require perpetual conservation to survive. It says that the multidisciplinary study by M. Finkelstein shows that condors absorb lead when feeding on animal carcasses which have been shot by hunters. It also mentions that leads poisoning can impair the function of the kidney, liver, and nervous system of the bird.