A group of similar families forms an order. A fat body stores the food energy of a butterfly or moth. These fleshy appendages provide sensory information for the caterpillar. They are often mistaken for antennae. Monarch caterpillars have two pairs of filaments.
Caterpillars eat foliage.
These are eaten by other carnivores. This layer is teeming with animal life, especially insects. The largest animals in the rainforest generally live here. Fossils have been found on every continent on Earth. Butterfly fossils are rare.