Many animals in return help the rainforest survive by spreading the trees' seeds. Multitudes of insects, bats and birds are also attracted during the flowering season. Very little light gets to this area, the air is damp and humid with little rainfall reaching the plants at this level. The leaves are often large to absorb as much light as possible. Trees tend to be fully grown by 10 metres.
Shrubs get even less opportunity to grow in their dingy lot.
Growth is sparse which enables animals to move freely about. Down in the Basement - the Forest Floor Dark, damp and warm. Vegetation is sparse. The jungle growth which you see in the movies can be only found along the edges of river banks and the outskirts of the actual forest, where sunlight is more abundant. On the forest floor away from rivers, the air is still.