Moths are in the same order as and are related to butterflies. Moths evolved before butterflies and there are approximately 160,000 moth species. Most moths are nocturnal. They have no balls at the end of their antennae as butterflies do. Like butterflies, moth larvae or caterpillars make cocoons and later emerge as fully grown adults. Moths have a reputation for being agricultural pests and have caused great damage to forests, fruit farms, and sometimes fabrics. The Silkworm Moth is farmed for the silk it produces to spin its cocoons. Moths like to fly around lights and although it is unknown exactly why they do this, it is suspected that it can possibly help them navigate directions.