Loggerhead sea turtle used on every confirmed nest to prevent excavation by resident red foxes. A new concern with the steel cage technique is interference with the normal development of the nestlings' magnetic sense due to the use of ferrous wire, which may disrupt the turtles' ability to navigate properly. Efforts are underway to find a nonmagnetic material that will prevent predators gnawing through the barrier. Up to 40% of nesting females around the world have wounds believed to come from shark attacks. Infectious bacteria such as "Pseudomonas" and "Salmonella" attack loggerhead hatchlings and eggs. Fungi such as "Penicillium" infect loggerhead sea turtle
San Clemente loggerhead shrike to help the shrike. For example, snipers must aim around bird nests when practicing. Thanks to the program, the bird's population reached 135 (captive and wild) specimens by 2004. In 2013, an estimated 70 breeding pairs were alive in the wild. San Clemente loggerhead shrike The San Clemente loggerhead shrike ("Lanius ludovicianus mearnsi") or San Clemente Island loggerhead shrike is a subspecies of the loggerhead shrike that is endemic to San Clemente Island, California. The San Clemente loggerhead shrike is a passerine bird of medium size. Around its eyes, it has black feathers, a color which is also found in