Bald Eagles Are Still Dying From Lead Poisoning
America's national bird is threatened by hunters. Not that hunters are taking aim at the iconic bald eagle, but bald eagles are dying after eating lead bullets, as CNN reported.
The Cape Fear Raptor Center, North Carolina's largest eagle rehab facility, has recently treated seven eagles for lead poisoning, executive director Dr. Joni Shimp told CNN. The center also said that 80 percent of the eagles it has had to euthanize since November were because of lead poisoning.
Similarly, officials from the Hatteras Island Wildlife Rehabilitation in North Carolina said that 70 to 80 percent of the eagles they treat have high levels of lead in their system, and the effects are devastating, according to WTKR in North Carolina and coastal Virginia.
As CNN explained, hunters use lead bullets to kill deer and other animals. When the eagles feast upon the dead animals, they are indirectly exposed to toxic levels of lead.
"Hunters in no way, shape or form intentionally try to kill an eagle, vulture or any other species," Shimp said to CNN. "If the deer isn't killed immediately and runs and the hunter can't find the deer, the eagles and vultures find it and ingest the lead."
Shimp also explained some of the neurological problems that result from lead exposure to eagles. She told CNN that the eagles will show a "lack of judgment when flying across roadways, the inability to take flight quickly resulting in being hit by cars, seizures and death."
The bullets hunters use often scatter into tiny fragments that travel through an animal's body.
"It's often said a piece of lead the size of a grain of rice is enough to take down an eagle," Doug Hitchcox, a naturalist from Maine Audubon, said. Maine had five cases of eagles dying from lead poisoning in January alone, according to NECN in New England.
Hunters and bird advocates agree that changes in ammunition would go a long way to solving the problem. That small change makes a big impact for eagles. "The most direct thing would be to switch to copper bullets instead of lead," Browning said to WTKR.
Similarly, David Trahan, the executive director of the Sportsman's Alliance of Maine said that education and outreach are essential to prevent the problem, according to to NECN. He also advocates using copper bullets, especially for big animals like moose where pieces of meat are often left behind.
"If you're going to kill an animal and leave it in the woods like that, let's use a copper bullet," Trahan said to NECN. He added, "I know of no hunter who wants to hunt an animal and knowingly kill a bald eagle."
Trahan also felt that outreach could protect people as well, since lead is toxic to us as well.
"If I give meat to kids, to family, I want to make sure I'm not providing something to them that could be harmful," he explained to NECN, suggesting that lead bullets be used in training and at gun ranges, where it won't come into contact with wildlife.
According to the American Bird Conservancy, millions of birds every year die from lead poisoning, as CNN reported.
"It's an overall US problem. The lead poisoning increases during deer season but we see it all year," Shimp said to CNN. "Some times it's chronic low-grade exposure over time that also brings them down."
She too suggests that large stores should sell copper bullets.
"We need to target the big chain stores and get them to carry copper bullets," Shimp said to CNN. "Then I can set up education days at these stores, with a vulture, red tail (hawk) or eagle and show the hunters and point them to the copper ammo. Then we can start to win this war ... the war on lead, not on hunters."
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Spring is coming. And soon, tree swallows will start building nests. But as the climate changes, the birds are nesting earlier in the spring.
"It's getting warmer overall. They're thinking, OK, it's a good time to breed, to lay my eggs," says Lily Twining of the Max Planck Institute for Animal Behavior in Germany.
She says that despite recent warming, late-season cold snaps remain common. Those cold snaps can harm newborn chicks.
Hatchlings cannot regulate their body temperature, so they are vulnerable to hypothermia. And the insects they eat stop flying in cold weather, potentially leaving the chicks to starve.
"These chicks are growing very, very fast," Twining says. "They have very high energy demands, so… if they don't get a lot of that good high-quality food during this pretty specific time… that's when these cold weather events seem to be most devastating."
For example, data from Ithaca, New York, shows that a single cold snap in 2016 killed more than 70% of baby tree swallows.
"And there have been more and more of these severe cold weather die-off events for these tree swallows as they've been breeding earlier and earlier over the past 40 or so years," Twining says.
So for these songbirds, earlier springs can come with devastating consequences.
Reporting credit: Sarah Kennedy / ChavoBart Digital Media
Reposted with permission from Yale Climate Connections.
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