Aggressive encounter between two male Greater Prairie-Chickens on a lek. During aggressive encounters males lower their pinnae feathers, deflate their air sacs, leap into the air, and strike their opponent with feet, wings, and/or beak. Ft. Pierre National Grassland, South Dakota.
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Aggressive encounter between two male Greater Prairie-Chickens on a lek. During aggressive encounters males lower their pinnae feathers, deflate their air sacs, leap into the air, and strike their opponent with feet, wings, and/or beak. Ft. Pierre National Grassland, South Dakota.