Moths are so diverse that it is often difficult distinguish them from butterflies. While there are many exceptions, what differentiates the two are a moth's lack of a "clubbed" antenna, their nocturnal activity, and the possession of a unique spine-like structure supporting their hind wings.

Like butterflies, moths can be found in most climates or habitats, ranging from the seashore to the highest vegetated parts of mountains and from arctic to tropical regions.

Moths consist of over 100 different families.