A tree in my neighbor's yard became a stage for a dramatic confrontation between a single hawk and dozens of crows. The best I could figure out was the hawk had his eye on some fledgelings in a crow's nest. The crows seemed to understand the hawk's intention and weren't going to let it fulfill its desire. It was very noisy and intense. The little ones were obviously in serious danger. It was wonderful to watch the much smaller crows work together to thwart the much larger predator's attack. No written plans just a committed group of volunteers working together with purpose. Beautiful.