Matthew Morris, the Duchy’s rural director, said the project had been a “significant moment” for the moor.
“Curlew were close to disappearing as a breeding bird from Dartmoor,” he said.
“The progress made over these five years shows how nature can respond when the right conditions are restored and when land managers, farmers and conservation partners work together.”
Jon Avon, curlew recovery project officer for the Duchy, said the recovery had been encouraging, but more work was needed.
He said: “While progress has been made, the recovery is still in its early stages, and the next phase will allow us to continue the practical work needed to support long-term breeding success across both curlew and other endangered bird species.”