The heritage group, An Taisce, has called on the Minister for Heritage, Heather Humphreys to justify a decision to allow Star Wars to be filmed on Skellig Michael.
Filming by Disney Lucasfilm, the company behind the Hollywood blockbuster, is due to begin on the Skellig again in mid-September.
The Irish Times reports An Taisce claims that there is a threat to birdlife on the island, particularly through the possibility that rats will get onto the Skellig with cargoes being transported there.
An Taisce says the proposed filming – which could last up to six weeks – is much more significant than the fliming of last summer.
An Taisce heritage officer, Ian Lumley, says that any damage to the world heritage site could leave the State open to legal action from the EU.