Loggerhead sea turtle both magnetic and visual cues. When both aids are available, they are used in conjunction; if one aid is not available, the other suffices. The turtles swim at about during migration. Like all marine turtles, the loggerhead prepares for reproduction in its foraging area. This takes place several years before the loggerhead migrates to a mating area. Female loggerheads first reproduce at ages 28–33 in Southeastern United States and Australia, and at ages 17–30 in South Africa. Age at first reproduction in the Mediterranean, Oman, Japan, and Brazil are unknown. Nesting loggerheads have a straight carapace length of . Because
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