Blue-footed booby (Sula nebouxii) showing blue feet in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

sula nebouxii blue feet galapagos islands ecuador wildlife birds marine life south america natural habitat unique colors mating display coastal bird seabird island ecology animal behavior avian species tropical environment conservation biodiversity oceanic islands quirky birds plumage zoology ecosystems birdwatching animal traits color adaptation galapagos ecology coastal cliffs rocky terrain birdlife tropical wildlife endemic species conservation efforts research wildlife observation evolutionary traits animal kingdom habitat conservation environmental protection natural selection species characteristics fauna island species tropical fauna blue coloration