At higher altitudes as in Bismarck and Kratke ranges, the vegetation type is mountain rainforest dominated by beech forest and pandanus species. At much higher altitude over 3,000 metres, alpine grassland and moss forest are common vegetation type. At lower altitude (1,500 metres or less) especially towards border areas of coastal provinces where there is very high rainfall and humidity, lowland rainforest is found. The vegetation type is very diverse and heterogeneous in species composition and is home to a diverse range of exotic flora and fauna.