Mallard Mallards Mallard Mallard Ring-Billed Gull Jailhouse and Courthouse Rocks Chimney Rock National Historic Site Sunflower Sunflower Scotts Bluff National Monument Scotts Bluff National Monument Scotts Bluff National Monument Scotts Bluff National Monument Scotts Bluff National Monument Scotts Bluff National Monument Oregon Trail ... Scotts Bluff National Monument Scotts Bluff National Monument Chimney Rock National Historic Site Big Horn Sheep Violet-Green Swallow Chipmunk Moraine Park and Museum Gadwall Gadwall Pair Gadwall Shoe Line Great Tailed Grackle Snowy Egret Red-Tailed Hawk House Sparrow Ring-Billed Gulls Blue-Winged Teal Petroglyphs Petroglyphs Quarry Area Entrance River by the Quarry Area View from the Canyon Area Rafters on the River Below View from the Canyon Area View from the Canyon Area View from the Canyon Area View from the Canyon Area Dinosaur National Monument Eurasian Collared Dove