Culling the rat population on Lundy 10 years ago has led to a "striking" increase in the number of seabirds on the island, the National Trust has said.
The Lundy Seabird Recovery Project was set up in 2003 to help the Manx shearwater population, which had fallen to just 300 breeding pairs.
A survey this spring revealed a tenfold rise in numbers to 3,000 pairs.
It also recorded a substantial rise in other species, including puffins.
The previous decline in birdlife on Lundy was blamed on rats, which came via ships to the island off the North Devon coast and ate birds' eggs and attacked young chicks.