V06206 Blackbirds Riding on Grazing Bison Herd in Wyoming on an Autumn Evening by Pronghorn Productions in Bison , Mammal , Ungulate Full HD (1920x1080) – $29 HD (1280x720) – $19 Add to Cart Checkout Added to cart Blackbirds Riding on Grazing Bison Herd in Wyoming on an Autumn Evening $19