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Northern Red-Bellied Cooters release approaching- Getting a “Head Start”!

With all the diverse wildlife in Massachusetts, the Northern red-bellied cooter is one of the most beautiful…and endangered!  The Northern red-bellied cooter population of Massachusetts lives more than 250 miles from the rest of the species who inhabit areas of Maryland, Virginia and North Carolina. Listed under the Endangered Species Act since 1980. In 1984, due to habitat loss, predation and pollution, a mere 300 remained in Northern ecosystems (

Thanks to the Head-Start program, these turtles have rebounded. The Head-Start program works with local conservation organizations, such as NMLC, who welcome hatchlings in the fall and provide warm water and food for 8 months to promote growth among the turtles. Kept in 82 – 86 degree tank, they are provided with as much romaine and red leaf lettuce as they will eat.  When they are released back to their natural habitats in early summer, chance of survival is increased due to weight and development gained in captivity. Survival can increase from 1% to over 70%!  Almost 3,500 turtles have been released since 1984. Although “head-starting” is crucial to the cooter’s survival, habitat protection is key for long-term success.

Northern red-bellied cooters have about a 90% mortality rate in the first year of their lives. The head start program allows them to grow 3-4 times the size of a wild turtle in the same time period and therefore be less vulnerable to predators upon release in the spring. The National Marine Life Center has been participating in the program since 2006 and has successfully released 68 hatchlings.

Credit: U.S. Fish and Wildlife National Digital Library

Upon arrival and before release, they are weighed, measured and photographed for our records. Each turtle has a unique pattern on it’s plastron (the underside of the shell), helping us to distinguish them. The turtles must measure at least 85mm to be eligible for release.

The red-bellied cooters have been with NMLC since the fall, and soon it will be time to release them, seeing them off into the freshwater habitats of Southern Massachusetts. The location has not officially been released, but within the next few weeks (or even sooner), these developed turtles will set off back into the wild.

It is the first year in which NMLC is hosting the official  Mass Wildlife Red Bellied Cooter Turn-in event. The turn -in will be held on Thursday May 30th in our Marine Animal Discovery Center and classroom. All of the organizations  that participate in the headstart program will come together  and turn their hatchlings back over to the state to be prepared for release. Over 100 turtles will be congregated to be weighted, measured, notched with a unique identification pattern, and micro-chipped. Representatives from each group will meet to discuss obstacles faced this year and improvements we can make to the program. NMLC Veterinarian Dr. Willaims will  present on Metobolic Bone Disease and fungal infections , two of the most common complications seen in the program. NMLC is excited and honored to be hosting the culmination of this years efforts.

The release date and  site for this year’s headstart class has not yet been disclosed by the state biologists. Stay tuned to our website for this announcement very soon. The public is welcome to attend, and staff from NMLC will be at the site with a booth to answer your questions about our facility and the headstart program. Witnessing such a successful growth in an endangered species is rare and demonstrative of the importance of organizations within the headstart program.

Check out some of these great websites for more information on the red-bellied cooter:

And stay tuned for updates on a final release location and date!


A red-bellied cooter is notched and pit-tagged (a device similar to a microchip) to monitor progress in the wild.


  1. Hi Michael.
    Thanks for your interest in the red bellied cooter head start program! To inquire about getting involved, please contact Dr. Tom French at the Massachusetts Natural Heritage and Endangered Species Program. You can reach them at or (508) 389-6360.

  2. Hi
    My name is Michael Donofrio. I am school teacher and was hoping to get my students involved in the Norther red-bellied cooters head start program. Who do I contact to get them involved?

  3. Hi Griffin.
    It is a great project, especially for students! The Massachusetts Natural Heritage and Endangered Species Program biologists manage the red bellied cooter program. You should contact them at or (508) 389-6360. Here is more information on the state’s program. Good luck!

  4. This sounds like an amazing project. Some students in the environmental club at my high school brought this to my attention after visiting the New England Aquarium. They would really like to know if there was a way our school could get involved in the raising of the turtles over the winter. What is the best way to find out more information on the project?

  5. Thanks very much for your support, Mae!

  6. Thank you, Janet, for your kind words!

  7. Wonderful work with these precious turtles!

  8. Well done, folks! Thanks to your hard work, these adorable cooters have a great chance at a long happy life!

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