The shell margin of young loggerheads has a somewhat serrated appearance which disappears as the turtle matures. The limbs are paddle-shaped and each bears two claws. Scales on the top and sides of the head and top of the flippers are also reddish-brown, but have yellow borders. The neck, shoulders and limb bases are dull brown on top and medium yellow on the sides and bottom. The plastron is also medium yellow.
Hatchlings are dull brown in color.
20 g. Maturity is reached at between 16-40 years. Species Loggerheads are known to travel as far north as Nova Scotia or south to Argentina. As loggerheads mature, they travel and forage through near shore waters until the breeding season, when they return to the nesting beach areas. The majority of mature loggerheads appear to nest on a two or three year cycle. Like their cousin the tortoise, sea turtles may take their time, but they are remarkably persistent, according to new evidence from an Earth watch sponsored researcher.