The enormous Aldabra giant tortoises were found dumped in Ashclyst Forest, north of Exeter.
Scientists are hoping to breed hybrid tortoises in a renewed attempt to resurrect two extinct subspecies.
Where once there were just 15 Espanola giant tortoises left there are now more than 1,000.
One of the last remaining Galapagos giant tortoises left in the world has delighted conservationalists when a number of ...