Three oil-coated white ibis sit in marsh grass on a small island in Bay Barataria near Grand Isle, Louisiana June 13, 2010. These birds are being rescued and transported to the Fort Jackson Rehabilitation Center by well-trained and knowledgeable wildlife responders, veterinarians, biologists and wildlife rehabilitators. Oil from BP's out-of-control Gulf of Mexico oil spill could threaten the Mississippi and Alabama coasts this week, U.S. forecasters said, as public anger surged over the nation's worst environmental disaster.