Tree Swallows Battle a Brown-headed Cowbird ONE MINUTE’S WORTH OF BEAK TO BEAK AERIAL ACTION! Watch a pair of Tree Swallows run a female Brown-headed Cowbird away from their nest. The action is so fast and furious that I put some of it in slo-mo. https://youtu.be/au8oujQzmRw Share this:TwitterFacebookLike this:Like Loading... Related