Twice each year shorebirds along the eastern seaboard migrate thousands of miles between North and South America. In the fall they head south to their wintering grounds, and then return to their northern breeding grounds in the Spring. To make this trek and still survive means finding high protein foods to provide the energy they need. And there aren’t many items on a bird’s menu that packs in more protein than the eggs of other animals. This is where the horseshoe crab comes in.