Loggerhead sea turtle turtle is debated, but most authors consider it a single polymorphic species. Molecular genetics has confirmed hybridization of the loggerhead sea turtle with the Kemp's ridley sea turtle, hawksbill sea turtle, and green sea turtles. The extent of natural hybridization is not yet determined; however, second-generation hybrids have been reported, suggesting some hybrids are fertile. Although evidence is lacking, modern sea turtles probably descended from a single common ancestor during the Cretaceous period. Like all other sea turtles except the leatherback, loggerheads are members of the ancient family Cheloniidae, and appeared about 40 million years ago. Of the six species
Loggerhead Key Loggerhead Key Loggerhead Key is an uninhabited tropical island within the Dry Tortugas group of islands inside the Gulf of Mexico. At approximately 49 acres (19.8 hectares) in size, it is the largest island of the Dry Tortugas. Despite being uninhabited, the island receives visitors, such as day visitors and campers. The island only has a few built structures, including the Dry Tortugas Light and a lightkeeper's house that was constructed in the 1920s. The island has drinking water derived using desalination technology and solar power. The Carnegie Marine Biological Laboratory operated on Loggerhead Key from 1904 to 1939. Loggerhead