It's mating season for elk, and one particularly aggressive bull at Estes Park, Colorado, has been showing his dominance by charging anything in his way, including people and cars. A video of the ...

It's mating season for elk, and one particularly aggressive bull at Estes Park, Colorado, has been showing his dominance by charging anything in his way, including people and cars. A video of the ...

ESTES PARK, Colo. — The elk mating period has begun in Colorado. Starting Sept. 1, Rocky Mountain National Park officials institute their annual closures to prevent disturbance and harassment of elk ...

While bucks are fattening their bodies and growing antlers, female deer (otherwise known as does) are preparing for a short period of breeding behavior or estrus. This breeding period, called deer ...

A Texas State Park warned visitors of its bison as they enter into rutting season and bulls may display high amounts of aggression. Caprock Canyons State Park is home to the Texas State Bison where ...