The URA also received a position paper from the Nature Society (Singapore). The 10-page position paper, which The Straits Times has seen, pointed out that the area is rich in biodiversity. Rare animals, such as the critically endangered Sunda pangolin and banded leaf monkey, have also been spotted there. The society proposed that the area be developed in four stages instead of being cleared at one go. This will help to extend the lifespan of the forest. The URA said it has studied the proposal in detail, but that it was not feasible "due to the need to holistically introduce the supporting infrastructure required for the new neighbourhood". Said the URA spokesman: "We appreciate the time and effort put in by all stakeholders into this project, which has led to the undertaking of more mitigation measures.