Imperial Shags (Phalacrocorax (atriceps) atriceps) at breeding colony on small islets off the city of Ushuaia, Argentina, South America

imperial shags breeding colony ushuaia argentina small islets south america nesting season wildlife marine birds seabirds colonial nesting nature animal behavior rocky islets nesting activities foraging coastal habitat bird watching avian interactions patagonia ecological diversity natural habitat aquatic life biodiversity flight eggs chicks environment conservation animal kingdom group behavior ocean migratory birds avifauna bird species marine ecosystem social behavior coastal ecosystem nesting success adaptation territory reproduction seasonal patterns feeding habits ecological balance bird colonies wildlife observation