The Orangutan Forest is a great improvement compared with the previous situation for these great apes at Dublin Zoo. The original outdoors is now connected to a large elongated island in the natural lake. It is an extension to the island that was originally the domain for siamang, but now it has been made accessible for another arboreal species - the Bornean orangutan. In the wild the species spend the majority of their time in the trees of their native habitat in South East Asia. Hence, the enclosure comprises eleven trees, between 7 and 12 metres high that will encourage the orangutans' natural climbing behaviour. Five trees on the island are artificial and interconnected with ropes. These ropes allow the apes to travel between the island and the original outdoors in front of the orangutan House. The artificial trees have a lift inside to deliver the main portion of the apes' diet to the top of the trees. The outdoor enclosure of the orangutan is five times bigger than their old home, now 1,300 m2.