ROSE LAKE, Idaho (AP) — A grim death toll of migrating tundra swans is again being observed at northern Idaho marshes contaminated with toxic mining waste.
The swans headed for breeding grounds in Alaska stop at the marshes along the Coeur d'Alene River.
But the roots and tubers they feed on are laced with lead that's part of about 100 million tons of mining waste from the Silver Valley that has washed into the river system over the past century.
Lead shuts down the swans' digestive systems, and the birds slowly starve to death.
U.S. Fish and Wildlife Biologist Kate Healy says at least 150 of the large birds die each year as a result.
The U.S. Environmental Protection Agency is working to clean up the Coeur d'Alene Basin to make it safer for humans and wildlife.
- LDS dad among finalists for Doritos Super...
- Photos: Hollywood comes to Utah with the...
- Book review: Young widow's memoir presents a...
- Emma Watson to star in live-action 'Beauty...
- Family motto helps LDS couple put parenting...
- Australian mom removes heavy makeup from...
- 12 Disney movies that are coming out in 2015
- How to keep a youthful appearance
- Measles outbreak casts spotlight on... 20
- Are you part of the global 'baby... 12
- Australian mom removes heavy makeup... 12
- Va. Senate panel rejects adoption by... 5
- LDS dad among finalists for Doritos... 5
- Family motto helps LDS couple put... 5
- No-tip restaurant offers food for... 4
- Miss Colombia crowned Miss Universe in... 4