Adult sanderling (Calidris alba) feeding on the tidal flat in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

sanderling calidris alba tidal flat galapagos islands feeding shorebird low tide wildlife ecology coastal sand invertebrates habitat behavior nature birds ocean seabird foraging unesco site south america shore water sandy beach migratory animal wetland ethology conservation landscape tropical environment avian wading natural habitat biodiversity shorelines life ecosystem blue sky ecological site species tidal zone