KINGSTON, Jamaica -- An extensive fuel spill has fouled a stretch of shoreline and oiled pink flamingos and other wildlife in a nature preserve in Curacao, conservationists and residents of the tiny Dutch Caribbean island said Monday.The leader of a local environmental group asserted Monday that the spill of crude oil at Curacao's Jan Kok preserve was from at least one storage tank owned by the Isla oil refinery, the largest business and employer on the southern Caribbean island best known for its diving opportunities and colorful capital of Willemstad.