Many human activities have negative effects on loggerhead sea turtle populations. They are predators of sea turtle nests. Eurysternum is an extinct genus of sea turtle. Stanton himself provided the voice of Crush the sea turtle. The Philippines has had several initiatives dealing with the issue of sea turtle conservation. Bycatch is a large contributor to sea turtle deaths. Tortuguero is considered to be the founding location of sea turtle conservation. A great deal of intentional sea turtle harvests worldwide are for food. All species except the leatherback sea turtle are in the family Cheloniidae. Sexual dimorphism of the loggerhead sea turtle is only apparent in adults. Several projects worldwide seek to preserve the olive ridley sea turtle population. Bald Head Island is nationally recognized for its sea turtle nesting activity. Nearly all species of sea turtle are classified as Endangered. Long-lining has been identified as a major cause of accidental sea turtle deaths. Leatherbacks have slightly fewer human-related threats than other sea turtle species.