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 shrike upon thorns or barbed wire for facilitated consumption. The numbers of Loggerhead shrike have significantly decreased in recent years, especially in Midwestern, New England and Mid-Atlantic areas. In 1760 the French zoologist Mathurin Jacques Brisson included a description of the loggerhead shrike in his "Ornithologie" based on a specimen collected in Louisiana in the Unites States. He used the French name "La pie-griesche de la Louisiane" and the Latin "Lanius ludovicianus". Although Brisson coined Latin names, these do not usually conform to the binomial system and are not recognised by the International Commission on Zoological Nomenclature. When in 1766 the