Adult Nazca booby (Sula grantii) pair in courtship in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

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

Southern elephant seal (Mirounga leonina) bull holding adult female in the surf to mate with her, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island in the Southern Ocean

Southern elephant seal (Mirounga leonina) mating behavior on South Georgia Island in the Southern Ocean

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, Ecuador

King penguin (Aptenodytes patagonicus) mating behavior at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean.