Deep, crusty snow piled up on fields in eastern Colorado after last week’s snowstorm is driving herds of pronghorn onto roads, and dozens of them are dying, Colorado Parks and Wildlife

According to Colorado Parks and Wildlife, the herd likely congregated on the highway because of drifting snow on the ground and in the fields.

A significant number of pronghorns have died on eastern Colorado roadways as winter descends upon the region, according to state wildlife officials.