evidence: We conclude that the abundance of birds at Ilha Comprida varied substantially during the study period of three years, especially on a local scale. Many factors may contribute to this variation, including changes in habitat, habitat selection, behavior, food resources, site fidelity, predation, the population of source areas, or weather conditions during winter, migration, or breeding. Ilha Comprida is one of the very few barrier islands in eastern Brazil with habitat suitable to shorebirds. As such, it is a stopover area of great regional and international importance for migratory North American shorebirds. [...] BARBIERI, E., MENDONÇA, J.T. & XAVIER, S.C. 2003. Importance of Ilha Comprida (São Paulo State, Brazil) for the sanderlings (Calidris alba) migration. J. Coast. Res. (35 special issue):121-130. [...] - BARBIERI, E., MENDONÇA, J.T. & XAVIER, S.C. 2003. Importance of Ilha Comprida (São Paulo State, Brazil) for the sanderlings (Calidris alba) migration. J. Coast. Res. (35 special issue):121-130.