While trekking out on the jetty in Provincetown, I kept noticing piles of broken crab, clam and mussel shells, and was initially perplexed by their presence. Once a seagull swooped down on the rocks right in front of me, though, it all became clear. After the sea gulls pluck a clam out of the sandy sea floor at low tide, they fly up to the jetty and repeatedly drop their meal onto the rocks until it cracks open enough for them to enjoy their reward. It was refreshing to learn that sea gulls are indeed capable of hunting and not just stealing your picnic lunch while trying to enjoy a day at the beach! Cape Cod, Massachusetts. Prints Available.