In a style which is fairly easy, it also describes the climatic conditions which allow rainforests to grow and briefly outlines the ways they have evolved into highly complex ecosystems. The tropical raln forests of the world are ancient, complex ecosystems , teeming with diverse life forms. Butterflies dance in rare shafts of sunlight from above.
Birds make exotic noises, and insects sizzle and click.
This restless background is often overlaid by the rattling thunder of rain on distant Ieaves, and the dripping of water as it drains out of the canopy. The combination of warmth and rain makes the air of the forest very humid, often saturated with water vapour. Mists shroud the trees as sun succeeds storm, rising up to form heavy clouds which pour out rain in their turn. High temperatures and rainfall, more or less constant throughout the year, combine to produce the warm steamy atmosphere common to all the world's tropical rainforests, from Queensland to the Amazon basin. In these hothouse conditions, protected from cold and drought, plants and animals flourish in dazzling and as yet uncounted variety.