The plant life of the archipelago reflects a mingling of Asiatic and Australian forms with endemic ones. Vegetation ranges from that of the tropical rain forest of the northern lowlands and the seasonal forests of the southern lowlands, through vegetation of the less luxuriant hill forests and mountain forests, to subalpine shrub vegetation. The bridge between Asia and Australia formed by the archipelago is reflected in the varieties of animal life. The fauna of Sumatra, Kalimantan, and Java is similar to that of Peninsular Malaysia, but each island has its peculiar types. The orangutan is found in Sumatra and Kalimantan but not in Java, the siamang only in Sumatra, the proboscis monkey only in Kalimantan, the elephant and tapir only in Sumatra, and the wild ox in Java and Kalimantan but not in Sumatra. In Sulawesi, the Maluku Islands, and Timor, Australian types begin to occur; the bandicoot, a marsupial, is found in Timor. All the islands, especially the Malukus, abound in great varieties of bird life, reptiles, and amphibians. The abundant marine life of Indonesia's extensive territorial waters includes a rich variety of corals.