MTPR

Marias River

Grizzly bear.
(PD)

Montana Fish, Wildlife and Parks officials killed a grizzly bear along the Marias River on Monday. They’d been tracking the bear since it was shot by an area resident on July 26.

A beaver swims through a forest pond.
Josh Burnham (CC-BY-2.0)

In the great stands of old cottonwood trees along prairie rivers, chemical skirmishes are taking place between beavers, cottonwoods, and a certain species of beetle. Beavers gnaw on the trees; the trees fight back with toxic compounds; and the beetles move in to feast on the toxins. But in this apparent conflict, all three species benefit.