Loggerhead sea turtle although loggerhead sea turtles cannot retract their heads or flippers into their shells. Sexual dimorphism of the loggerhead sea turtle is only apparent in adults. Adult males have longer tails and claws than females. The males' plastrons are shorter than the females', presumably to accommodate the males' larger tails. The carapaces of males are wider and less domed than the females', and males typically have wider heads than females. The sex of juveniles and subadults cannot be determined through external anatomy, but can be observed through dissection, laparoscopy (an operation performed on the abdomen), histological examination (cell anatomy), and radioimmunological
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