This well-researched article by Rob Chaney of the Missoulian uses bear roadkill along US93 as a starting point to make a broader examination of grizzly mortality . . .
The dictionary defines “mortality” as both death and loss. For grizzly bears along the Northern Continental Divide, both definitions came into play last month when the ecosystem recorded five grizzly mortalities, although only four bears died. And because two of the deaths were adult females of breeding age, the loss could have longer term consequences.
On July 24, Montana Fish, Wildlife and Parks workers found a dead sow grizzly near the southern end of Hungry Horse Reservoir in the Spotted Bear Ranger District. The 16-year-old female had a radio collar that was sending out a mortality signal, indicating it had stopped moving. The carcass was too decomposed to immediately reveal the cause of death.
Three days later, the driver of a car on Highway 93 ran into a sow grizzly and two of her cubs about three miles south of Ronan. The bear family apparently came out of the barrow pit and tried to cross the highway together about 11 p.m. All three bears died at the scene. The driver and one passenger were injured and the car had to be towed away.