a herd of pronghorn deer rest in the open plains of wyoning yellowstone national park. mountain and rolling hills in background

afternoon america american animal antelope big blue brown clear deer doe dry elevation expanse female game grass green heard herd highland hill hills horn hot mammal meadow mountain national open park plain plains prairie prong pronghorn rest resting rests rolling scenic sky sleeping sleeps space states ungulate unique united vale wide wild wildlife wyoming wyoning yellowstone