A snowy tree cricket feeds on a leaf from a mountain dalea plant. Gerardine Vargas hide caption

itoggle caption Gerardine Vargas

An aggressive encounter between two male greater prairie chickens (Tympanuchus cupido). During aggressive encounters, males leap into the air and strike their opponent with feet, wings and/or beak. Fort Pierre National Grassland, South Dakota. Gerrit Vyn/gerritvynphoto.com hide caption

itoggle caption Gerrit Vyn/gerritvynphoto.com