Zion National Park is home to a California condor, an endangered bird with a wingspan of more than 9 feet, that soars the same skies she shared with her brother before he died.
Both sibling birds had fallen victim to lead poisoning. But while the sister, known as 1111, survived, the brother known as “1K,” did not, according to a statement by federal officials and wildlife advocates last month.
Now those who want to see the condor thrive are reminding the public of the dangers that lead-based ammunition — used by hunters to kill animals — can pose to the giant birds, who feed on animal carcasses.
“1K’s death is a tragedy because it was premature and preventable,” said Shawn Farry, California Condor Program Manager for the Peregrine Fund. “He had a wonderful way of endearing staff and visitors to the condor and its story, and for that, he will be missed by so many who were lucky to catch a glimpse of 1K soaring through Zion Canyon.”
1K was the first-ever condor to successfully fledge, or develop wing feathers large enough for flight, at Zion National Park, according to the Peregrine Fund, a raptor conservation organization.
He was also the 1,000th condor to hatch as part of the California Condor Recovery Program, an effort led by the U.S. Fish and Wildlife Service to revive the species.
A joint statement by the Peregrine Fund, U.S. Fish and Wildlife Service and Zion National Park called 1K’s hatching “a pivotal moment” for the program.
But when a radio tag that biologists used to track 1K stopped moving, the scientists were “devastated to find him dead,” the fund’s statement said. “Necropsy results confirmed what the team had suspected as the cause of death: lead poisoning. 1K died just short of his fifth birthday.”
According to the Peregrine Fund, California Condors are “particularly vulnerable” to lead poisoning because, as scavengers, they feed on animal remains. If an animal is shot with a lead bullet, scavengers who feed from the carcass may consume lead.
1K’s sister 1111, who was the second wild-fledged condor in Zion National Park, was trapped and tested in January 2024, the fund said.
The team found high levels of lead present and 1111 was transferred to Liberty Wildlife, a wildlife rehabilitation center in Phoenix, Ariz., for treatment.
“When a lead-based bullet hits an animal, it often fragments into hundreds to thousands of small, little pieces of lead,” said Tim Hauck, Peregrine Fund’s California Condor Program Director.
Those fragments of lead then get eaten by condors, Hauck said.
When condors eat, they store food in storage areas in their body called crops, Hauck explained. Hauck said their crops allow condors to keep food over a long period of time because they never know when their next meal is.
“That allows those little lead fragments to slowly break down in those really strong stomach acids, and then it gets absorbed into the blood, and it gets absorbed into tissue,” Hauck said.
The Peregrine Fund said 1111 was released back into the wild on May 17. Her brother 1K had died during her absence, with field tracking efforts locating his body in early March.
Hauck warned that the California condor is an indicator species.
“They’re called obligate scavengers, because that’s all they do, is eat things that are dead. And so they play this vital function of cleaning up the environment and helping to stop the spread of disease,” he said.
