The American Oystercatcher is an excellent resident on the Galápagos Islands. They are distinguished by their large red beak, black and white body, and stout-looking pale pink legs. On the other hand, the female Oystercatcher is somewhat bigger than the male and has a longer beak. The American Oystercatcher eats bivalves, mollusks, and crustaceans, which they extract with their superbly fitted strong and powerful red bill. Oystercatchers utilize their huge and heavy mouths to break open mollusk shells; they are called for oysters, which are an important food source in their diet. Oystercatchers are very protective of their nests and may conceal their eggs with pebbles or broken shell fragments. This wise behavior protects them from potential predators.