Please let me be the first to call bull$hit on that.
Bear in mind it's living along the largest concentration of wolves, badgers, bears, lions & corvids in the lower 48, how much carrion containing lead fragments must the thing have had to have eaten in it's life. A bird that is primarily a hunting raptor & not a scavenger, to boot.
Over an average lifespan of 30 years (Google) that single bird must've eaten just about every single carcass shot within 30 miles of Yellowstone AND been unlucky enough to have found every trace of lead, from every bullet.
I'm sorry, but the math simply doesn't work for me.
Further studies have shown that actually consuming the average quantity of lead found in a recovered animal carcass, on a regular basis, has literally ZERO effect on (human) health.
Think about it....the average hunting bullet out west (primarily big .30s & 7s) weighs 180gn, give or take. If a recovered bullet retains 50% of it's mass (low estimate) & 50% of shots are passthroughs (SUPER low estimate...) statistically speaking, the average uncovered mule deer, antelope or elk, weighing a (WAG) average of 300lb therefore contains 45gn of bullet. Call 5gn of that jacket & you've got 40gn of lead.
The average critter is around 50% edible meat, innards & skin.
Therefore the average pound of meat contains 0.0000380952gn of actual lead.
The average golden eagle eats ½ to 1lb of meat per day (Google), split the difference & call that ¾lb, so 0.00002857140gn of lead per day.
At an average lifespan of 10950 days, that's a total of 0.31285683gn of lead in it's entire life. That's 1.75 No.12 shot, to put it in reasonable terms.
A hair under a third of a grain of lead, in it's entire life.
I'm calling a hard "BOLLOCKS" on the whole deal.....