Our mocking birds like to perch on the lamp post and the top of the Interpretive Center, the two tallest places around. From those spots they can see every other bird in any direction. If I hear some unusual song, it's usually the mocking birds giving a concert and trying to fool me. Usually I don't notice small birds on the fossil beds, but this time I saw some mocking birds and starlings running around on the mud. The mocking birds caught my attention because they seemed to be in a Batman mode. One would walk around, cocking its head to peer at the mud. Then, it would hold out its wings, like Batman holding out his cape, for a few seconds. No flying, jumping around, or wing beating. It just held them open for a while and put them down again. After this action, often it would grab for what I assume was an insect on the ground, then take a few more steps and pull the Batman bit again. Strangest thing I've ever seen! If I were a bug, I'd be terrified to see a mocking bird looking at me, whether his wings were open or not!