Author Archives: Hillary T.

About Hillary T.

Where: Mass Audubon Headquarters, Lincoln Who: Massachusetts transplant by way of Florida and New York. Raising two young girls, who she hopes will be budding naturalists Favorite part of the job: Learning something new every day from some of the smartest and most enthusiastic groups of people

All About Sea Turtles in Massachusetts

When most people think of sea turtles, they imagine these marine reptiles enjoying the warm waters of the tropics. However, visitors and residents of the Cape may not realize that each summer hundreds of these turtles make their way into waters around Cape Cod.  

Loggerhead © Elizabeth Bradfield

While sea turtles don’t nest north of the Carolinas, many sea turtles spend their summers in our nutrient-rich waters, feeding on the plentiful crabs, jellyfish, and other prey. In fact, warming water temperatures due to climate change is leading to turtles traveling farther north each summer.

When the time comes to head south for the winter, some juvenile turtles that have been feeding north of the Cape get trapped by its shape, or “hook”, becoming lethargic in the cooling water.  

When the water reaches about 50°F by early-November, these turtles become too cold to eat, drink, or swim—they become cold-stunned. Strong onshore winds, mostly from the north or west, push cold-stunned turtles onto the beaches. 


This is where a team of Wellfleet Bay Wildlife Sanctuary staff and trained volunteers come in. They patrol the beaches of Cape Cod night and day at high tide, on the lookout for cold-stunned turtles. Any turtle they find is rapidly transported to the sanctuary and then on to the New England Aquarium or National Marine Life Center for evaluation and rehabilitation. Since 1979, Wellfleet Bay’s Sea Turtle Team has rescued and recovered more than 5,000 turtles.   

Sea Turtles in Massachusetts  

While unlikely, it is possible to find five species of sea turtles on the Cape.  Wellfleet Bay Wildlife Sanctuary keeps track of sea turtles in the summer and early fall by asking boaters to report sightings at 

Kemp’s Ridley   

STATUS: Endangered  
The smallest and most endangered sea turtle in the world the Kemp’s Ridley is also the most common turtle found cold-stunned on Cape Cod Bay beaches. Juveniles are typically only 5-10 pounds, but adults can grow up to 100 pounds. Several hundred to over 1,000 strand each winter on Cape Cod.   


STATUS: Threatened  
This species has the largest geographic distribution of any sea turtle in the world. Juveniles and sub-adults can vary widely in size—between 30-200 pounds—and full-grown adults can reach 350 pounds. Loggerheads are becoming a commonly stranded species on Cape Cod. In recent years, an average of 24-26 are found cold-stunned, with a high of nearly 150 in 2012.   


STATUS: Threatened  
Green turtles are named for the green color of their body fat. Juveniles can weigh anywhere from 5-25 pounds, and adults can reach an impressive 400 pounds.   


STATUS: Endangered  
These are the largest turtle species in the world. Leatherbacks are also the only sea turtle whose body temperature can rise above the temperature of the surrounding water, due to a number of unique physical adaptations. Thanks to these adaptations, leatherbacks don’t cold-stun. But they can still be severely injured or killed by boat strikes, fishing gear entanglement, and ingesting plastic. Full-grown adult leatherbacks can reach up to eight feet in length and weigh 1,500 pounds!   

Atlantic Hawksbill   

STATUS: Endangered  
This species rarely leaves tropical water, making it the least common sea turtle found off Cape Cod. Only one or two cold-stunned individuals have ever been recorded. The hawksbill is listed as “Endangered” in Massachusetts and at the federal level. Adults can reach up to 180 pounds.   

Learn more  

Find out more about sea turtles and how you can get involved at  

Ways to Volunteer This Summer

Looking for a way to get out and give back? Consider lending a hand at one of our wildlife sanctuaries.

A volunteer planting a plant in the garden at a wildlife sanctuary.


June 11: Water Chestnut Removal by Canoe with Arcadia Wildlife Sanctuary in Easthampton

Water chestnut is an invasive plant that wreaks havoc on native plant and animal life, chokes out waterways, and interferes with recreation. Enjoy a beautiful day on the water pulling water chestnut and helping to preserve the habitat of this vulnerable waterway. This project was made possible through our cooperation with the Connecticut River Conservancy. Registration is required. This event was rescheduled from June 4 to June 11.

Metro South

June 19: Volunteer Work Day at Museum of American Bird Art in Canton

Work alongside staff with seasonal tidying all around this beautiful 120-acre wildlife sanctuary, just 15 miles south of Boston. Registration is required.

North Shore

June 26 and July 12: Pepperweed Pull in the Newburyport Area

Help keep this invasive plant from taking over the edge of the Great Marsh and learn about our additional efforts to steward this important area. Registration is required.

Metro West

Garden Volunteering at Habitat Education Center in Belmont

Give staff a hand with chores in our beautiful formal gardens and our Community Garden. Projects include planting, pruning, weeding, watering, fence clearing, mowing, and compost management. 

Habitat Restoration at Drumlin Farm in Lincoln

Help improve habitat quality for native species; learn about plant ID and restoration techniques; and spend time outside.

South East

Trail Stewards at Tidmarsh in Plymouth

Walk the trails at Tidmarsh on a regular basis, taking notes about seasonal changes, reporting changes to the property including potentially hazardous or unpleasant trail conditions (storm damage, trash, tracks), and more.

Trail Blazers at Allens Pond in South Dartmouth

Blaze new trails and construct trail features along 9 miles of trails, helping to preserve the ecological integrity of areas in and around the sanctuary. Examples of projects include trail maintenance, boardwalk construction, removing invasive plants, burning brush piles, or planting native plants.

Trail Stewards at Oak Knoll and Attleboro Springs in Attleboro

Walk trails or boundaries weekly on Oak Knoll or Attleboro Springs Wildlife Sanctuaries and identify management problems (such as trash deposits, tracks of motorized vehicles, damage to natural assets); identify animal and plant species; observe and document seasonal changes (make field notes, and if possible photographs or drawings); and assist in routine maintenance of trails.


Weekly Volunteering at Broad Meadow Brook in Worcester

Every Wednesday morning and the 1st Saturday of every month help care for the sanctuary and enjoy a few hours of fresh air, fun and fulfillment. Help put up signs and markers, look for wildlife tracks, pick up branches, fill the bird feeders, and more.


Weekly Volunteer Work Days and Butterfly Garden Clean Ups at Felix Neck Wildlife Sanctuary in Edgartown

Every Thursday morning you can help with projects, gardening, hiking trails, or other needed work around the Sanctuary. And Thursday afternoons, work alongside knowledgeable garden volunteers and learn about which plants provide food for Island butterflies and birds.