National Geographic : 1945 Jun
Sights and Sounds of the Winged World On Pairing Grounds They Make Their Mating Calls in Spring Male Prairie Chickens inflate their neck sacs as sounding boards and send their "oom-boom-boom" often two miles across the prairie. They range from Indiana to Colorado and into Canada, but are scarce. O National Geographic Society Kodachromes by Arthur A. Allen "Hoot, Mon!" Says the Sharp-tailed Grouse, Like a Doughty Scot With inflated air sacs like those of the Prairie Chicken, the cock of this species makes a call less musical and more abrupt. The male birds do a curious, stiff-legged dance for their ladyloves. Sharptails range from Wisconsin to eastern Colorado and northward into Alaska.