Butterfly

Definition

Any member of the lepidopteran superfamily Papilionoidea, distinguished from moths by clubbed antennae, typically diurnal activity, large wings that fold vertically at rest, and a characteristic fluttering flight. Butterflies undergo complete metamorphosis with a caterpillar larval stage and a pupal stage (chrysalis).

Etymology

From Middle English 'buterflie,' a compound of 'butter' and 'fly,' possibly from the yellow color of common species or folk beliefs about their diet.

Example

The monarch butterfly (Danaus plexippus) migrates thousands of kilometers between North American breeding grounds and Mexican overwintering sites, with successive generations completing the round trip.

Synonyms

• papilionoid

Related Terms

• Moth
• Lepidoptera
• Papilionoidea
• clubbed antennae
• complete metamorphosis
• chrysalis
• caterpillar
• Diurnal
• Pollinator
• mimicry

Usage Notes

In strict usage, 'butterfly' refers only to Papilionoidea, excluding skippers (Hesperioidea) and moth-butterflies (Hedyloidea), though popular usage often includes all diurnal, colorful Lepidoptera. Contrast with moth: butterflies typically rest with wings folded vertically, have clubbed rather than feathery or thread-like antennae, and lack the frenulum wing-coupling mechanism found in most moths. The term is sometimes applied informally to unrelated insects with similar flight patterns, such as certain caddisflies or planthoppers, but these are not true butterflies.