Angry BlueBird

I watched this little guy defend this nesting box from a relentless assualt by Tree Swallows. Eveytime he would leave the box they would fly in, he'd fly back and chase them away. This went on for over an hour that I observed. At one point he hopped over to the edge facing me and gave me this "You want a piece of me too?" Look. Taken at Bombay Hook NWR, Delaware.