The Peruvian booby (Sula variegata) is an endemic bird of the Peruvian current whose distribution is restricted to the west coast of South America from Punta Pariñas (4.6°S) in Peru to Concepción in Chile. It is the second most abundant seabird species that inhabits the Peruvian coast and the second most important guano-producing seabird. During the mid-twentieth century, the Peruvian booby population reached 3 million birds.After ENSO 1982–83, less than 0.2 million birds were left.