94. Greater Prairie-Chicken-Vyn-070414-0107.tif
Male Greater Prairie-Chicken (Tympanachus cupido) displaying on a lek. Booming is a low frequency 3-syllable sound produced by the syrinx and amplified by the esophageal air sacs of males. During the Booming display males produce sounds by stamping their feet, Wing-shaking, and Tail-clicking. Ft. Pierre National Grassland, South Dakota. April.