Complex sentence: The aim is to restore the islands to their natural state without introduced predators such as stoats and rats, including the reintroduction of bird and insects, the most successful so far being the Buff Weka translocation programme.
Split into simpler sentences: The aim is to restore the islands back to their natural state without introduced predators such as stoats and rats. Also to reintroduce bird and insect species back to islands the most successful so far being the Buff Weka translocation programme.