Animal

Loggerhead sea turtle

Caretta caretta

Also known as: loggerhead, Caretta caretta

The largest sea turtle nesting in the U.S. — adults 250–400 lbs, 3-foot carapace length, with the species' characteristic massive head and powerful jaws (the source of the common name). The Atlantic loggerhead population nests on the Sea Islands and broader southeastern U.S. beaches each summer, with the Cumberland Island, Sapelo, Wassaw, Ossabaw, and Hilton Head beaches among the most productive nesting locations on the U.S. East Coast. Federally listed as threatened (the Atlantic population) under the Endangered Species Act since 1978. Sea Islands beach-and-dune conservation programs — including the Tybee Island Marine Science Center's stranding response, the Caretta Research Project on Wassaw Island, and the Georgia DNR sea-turtle nest-monitoring program — are central to the species' continuing recovery.

Scientific

Caretta caretta is the largest hard-shelled sea turtle and the most-numerous sea turtle in U.S. waters. Adults reach 250–400 lbs and a 3-foot carapace length; rare individuals exceed 1,000 lbs. The species name and common name both reference the disproportionately large head — the species’ jaw musculature is among the most powerful of any sea turtle, allowing it to crush whelk, conch, and large bivalve shells that other sea turtles cannot consume.

Females reach reproductive maturity at 25–35 years and return to the beach where they themselves hatched to lay eggs. The Atlantic loggerhead population nests on U.S. southeastern beaches from [[asheville|North Carolina]] through Florida (with smaller populations into the Gulf of Mexico). [[sea-islands|Sea Islands]] beaches — Cumberland Island, Sapelo, Wassaw, Ossabaw, Tybee, Hilton Head, Hunting Island, Cape Romain — are among the most productive nesting locations on the U.S. East Coast. Females nest 3–5 times per season at 14-day intervals; each nest holds 80–120 eggs incubated in beach sand for ~60 days. Sex is temperature-dependent: cooler nest temperatures produce males, warmer produce females. Climate-change-driven beach warming is currently producing a severe female-bias in some Atlantic populations, with conservation implications still being assessed.

Conservation

Federally listed as threatened (the Northwest Atlantic population) in 1978. Recovery has been slow but real: [[sea-islands|Sea Islands]] nest counts have increased substantially since the 2000s, with Georgia coast nesting in particular doubling between 2000 and 2020. Threats include incidental fisheries bycatch (longline, shrimp trawl), boat strikes, plastic ingestion, beach development reducing nesting habitat, light pollution disorienting hatchlings, and climate-change-driven temperature shifts in nest sands. Conservation work is institutionally dense across the Sea Islands: state DNR monitoring programs, the Caretta Research Project (Wassaw Island), [[tybee-island-marine-science-center|Tybee Island Marine Science Center]]‘s stranding response, beach-lighting ordinances in coastal towns, and beach-driving regulations.

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Scientific

Conservation

See also

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