Wyoming authorities are stepping up warnings about moose-vehicle collisions along Highway 390 in Teton County after some game wardens had to shoot and kill a suffering mother in front of her calf.

The Wyoming Game and Fish Department says wardens had to shoot the cow moose Dec. 16 because her right leg had been shattered by a car. Afterward, her calf moose pawed at the corpse and ran around in circles in distress.

The Jackson Hole News & Guide reported that it was the third moose one of the wardens he has had to put down on that section of road this year.

The Wyoming Department of Transportation has moved flashing message signs to Highway 390 to warn people about wildlife on the road.