Will helped facilitate the Quito workshop that led to the development of five different predictive GIS models for Ceruleans, and these models in turn were used to develop a sampling design to further research on Cerulean Warbler distribution and habitat associations on the nonbreeding grounds.  The modeling and subsequent monitoring and research leads to meaningful conservation, management, and protection acquisition aimed at maintaining and improving habitats for the Cerulean Warbler in South America.  El Grupo Cerúleo, the international subcommittee of the Cerulean Warbler Technical Group, serves as a model of a successful partnership of federal and state agencies, non-governmental organizations, and academic institutions from the U.S., Canada, and all five countries of the South American nonbreeding range of this long-distance nearctic/neotropical migrant.  One outcome of El Grupo’s work has been the first reserve in South America set aside specifically to conserve a North American migrant on the wintering grounds: the Reserva Cerúlea in San Vicente de Chucurí, Colombia.