Adult Swallow-tailed gull (Creagrus furcatus) on Espanola Island in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

creagrus furcatus espanola island galapagos islands ecuador south america wildlife birdwatching nature coastal habitat avian perched gray feathers red eyes rocky terrain marine bird endemic species ecosystem conservation tropical environment natural setting animal behavior coastal ecosystem habitat fauna biodiversity ornithology sunset galapagos wildlife natural history animal observation birding native fauna ecology species diversity travel adventure eco tourism scenic landscape coastal rock bird species travel destination nature lover outdoor exploration