Thousands of snow geese die in Montana after landing on contaminate...

Several thousand snow geese have died after a snowstorm forced large flocks to take refuge in the acidic, metal-laden waters of an old open pit mine in Montana.

Mark Thompson, environmental affairs manager for mine company Montana Resources, said witnesses described the pit as like “700 acres of white birds” on 28 November.

The estimated death toll is based on drone and aircraft flights over the pit,...

... “this kind of perfect storm”, with thousands of birds making a late migration and then facing a snowstorm at a time that Berkeley Pit had the only open water in the area.

... recent milder winters were not encouraging birds to head south as early and, in some cases, were causing some to stay in places where they had never stayed the winter before.

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