JACKSON, Wyo. — Researchers say nearly half of successful hunters participating in Grand Teton National Park's elk reduction program this fall used non-lead bullets.
Hunt reports show that 130 of 278 successful park hunters — nearly 47 percent — used the non-lead bullets,
That's up from 33 percent during the 2010 hunting season.
Biologists are looking to reduce lead poisoning in scavengers in Grand Teton and on the National Elk Refuge by distributing non-lead bullets to hunters.
Research has shown that blood-lead levels in eagles and ravens around Jackson Hole rise and fall in relation to hunting season.
Researchers think the scavengers ingest lead bullet fragments in gut piles left behind by hunters.