Pioneering golden eagle found poisoned in Yellowstone

As bird is found with large amounts of lead in its body, a biologist asks 'Is Yellowstone as protected as we once thought?'

The pioneering golden eagle took to the skies above Yellowstone national park in the fall and flew north, to areas where humans were hunting game. A few months later it returned to the park and was found on the ground, dead.

Scientists performing a necropsy on the creature, the first to be tagged with a radio transmitter in the park, made an unhappy discovery: it had been poisoned by lead. They are now raising concerns over whether US national parks are as safe for wildlife as they seem.