Spatial and Temporal Foraging Movement Patterns in Royal Terns (Thalasseus maximus) and Cayenne Terns (Thalasseus sandvicensis eurygnathus) in Northern Patagonia, Argentina

Royal Terns (Thalasseus maximus) and Cayenne Terns (Thalasseus sandvicensis eurygnathus) breed sympatrically in Patagonia, and very little is known about their breeding foraging patterns. Simultaneous information on the foraging patterns of both species using VHF radio-telemetry is presented from a mixed species colony in the Punta León Protected Area (43° 04′ S, 64° 29′ W), Chubut, Argentina. Transmitters were deployed on nesting adults of each...