A group of researchers from the University of California, Santa Cruz, has found in a recent study that the comeback of condors is being highly disturbed because of the increased lead poisoning, as per a recent report.

It has been found that the hunters' bullets carrying large amounts of lead have been endangering the lives of already most endangered species.

Though a ban had been declared previously on lead bullets to be provided in the birds' habitat, the same failed to bring any change in the picture.

A study was conducted by the team, which included examination of almost 1,154 blood samples of wild California condors. Testing these for nearly 13 years i. e. from 1997 to 2010, the group found that 48% of these were likely to die without treatment since they had consumed high levels of lead.

As per the team, the reason behind is Condors with the largest wingspan in North America are scavengers and their main diet is dead pigs, deer or other animals along with bullet fragments containing lead, to which the birds are often exposed.

Thus, the Center for Biological Diversity’s spokesperson, Jeff Miller says, "We've removed toxic lead from gasoline, paint and most products exposing humans to lead poisoning, now it's time to do the same for hunting ammunition to protect America's wildlife”.