New Jersey dumped 219 turtles in a river; now rescuers are building stations to help them survive winter season. Now their return to the wild is complicated

A pile of abandoned turtles beside a New Jersey river has grown into a much bigger conservation challenge than rescuers initially expected. What began with dozens of box turtles discovered along the Rahway River in July has now become a 219-animal rehabilitation effort but the hardest part may still be ahead. As winter approaches, the Mercer County Wildlife Centre is building outdoor “Brumation Stations” to allow the turtles to experience the cold season in conditions closer to those they would encounter in nature. But the unusual rescue also highlights a lesser-known problem in wildlife conservation: saving a turtle does not necessarily mean it can safely be returned to the wild.

The rescue grew from dozens to 219 turtles

The turtles were discovered on July 29 along a riverbank in Cranford, New Jersey. The group included Eastern box turtles, which are native to the state, along with three-toed box turtles, which are not native to New Jersey. The number of rescued animals kept increasing. By August 16, more than 200 had been recovered, and the Mercer County Wildlife Centre now says 219 turtles are connected to the dumping incident.

The scale of the emergency forced the wildlife centre to transform an entire building into temporary turtle housing. Some animals were also transferred to a veterinary facility for treatment and specialised care. Authorities have not identified who dumped the turtles, and the investigation remains ongoing.

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For a healthy-looking turtle, returning it to the nearest woodland might seem like the obvious solution. Conservationists say it can actually be dangerous. Eastern box turtles have relatively small home ranges and strong ties to their surroundings. The Conserve Wildlife Foundation of New Jersey warns that moving one from its territory can cause it to wander in an attempt to find its way home. That makes the question of where each turtle belongs almost as important as whether it is healthy enough to survive. The problem is even more complicated when animals have been illegally collected, transported or kept in captivity.

DNA testing could help decide their future

The Cranford rescue has therefore involved more than feeding and treating turtles. New Jersey Fish & Wildlife, veterinarians and researchers from the Philadelphia Zoo and Rowan University's veterinary school previously collected blood and swab samples from the rescued animals for disease and genetic testing. The results are intended to help determine appropriate long-term care and potential release plans. This approach has already changed turtle conservation elsewhere. In 2024, the US Fish and Wildlife Service described how genetic testing helped identify the origins of confiscated turtles before they were released.

Why is winter an important part of their recovery?

For now, rescuers are preparing for a different milestone: winter. Turtles do not hibernate in the same way mammals do. Instead, they enter a dormant state called brumation, becoming less active as temperatures fall and sheltering beneath soil, leaves and other natural cover. The Mercer County Wildlife Centre is constructing two outdoor enclosures to recreate those conditions. The centre says allowing healthy turtles to follow their natural seasonal cycle is an important part of rehabilitation and could help prepare them for eventual release.

The bigger threat to New Jersey’s box turtles

The dumping incident has also drawn attention to problems that existed long before these 219 animals arrived at the wildlife centre. Eastern box turtles face habitat destruction and fragmentation in New Jersey. Roads and development can isolate populations, while their slow reproductive rate makes it difficult for populations to recover quickly after losses. The species is also targeted by illegal collectors and the international pet trade.

The real goal is a second chance in wild

The Mercer County Wildlife Centre's immediate task is keeping the rescued turtles healthy through winter. Its longer-term objective is much more ambitious: returning as many suitable animals to appropriate natural habitats as possible. New Jersey Fish & Wildlife has said healthy native Eastern box turtles can ultimately be released into suitable habitat, while non-native three-toed box turtles are expected to be transferred to wildlife agencies within their native range.