The Marbled Godwit (Limosa fedoa) is a large shorebird that breeds in the grasslands of the north-central United States and south-central Canada, with small and isolated nesting populations along the southwest shore of James Bay, Canada, and on the Alaska Peninsula (Gratto-Trevor 2000). It migrates principally to the west coast of North America, wintering mainly from Washington to El Salvador, including the Baja California Peninsula (Gratto-Trevor 2000). Independently of any annual variation in numbers, the Marbled Godwit is common at Estero Punta Banda, with numbers estimated from many hundred (Jiménez et al. 2009) to nearly 2500 (Palacios et al. 1991) individuals.