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. The earliest butterfly fossils are from the early Cretaceous period , about 130 million years ago.
Caterpillars produce a lot of frass.
A frenulum is a small spine-like lobe that projects from a moth's hindwing. This structure helps hold the hindwings and the forewings together while the moth is flying. As stated in our privacy policy , we fully respect your privacy and will not use your e-mail address for any purpose other than the newsletter subscription. Search the Web with our sponsor, Overture. Without our visitors' support, Enchanted Learning would soon be off-line.