The bulk of the lowland areas of the Indomalayan ecozone consists of tropical forest. The climate, known as a monsoon climate, supports forest habitats. During the summer the constant heat over the northern part of the Asian continent gives rise to low pressure areas that bring moist winds in from the Indian Ocean. A rainy season ensues. During the winter the continent cools and dry air blows out towards the ocean. The mainland forests thrive in this seasonal rainfall, but the forests of the Malesian islands receive the wet winds all year round (both northerly and southerly winds blowing over sea areas before reaching them) and are particularly luxurious. Tree life is abundant, and many species of treewyrm exist in the tropical forest.