Generate a random butterfly or moth species, from familiar garden visitors to striking rainforest giants, for nature study, art inspiration, or learning something new.
Butterflies and moths are both Lepidoptera, an order named for the tiny scales covering their wings, and butterflies are really one small daytime branch within a group that is overwhelmingly moths. The usual rules of thumb are unreliable: antennae are the most consistent tell, clubbed in butterflies and feathery or tapered in moths, while resting posture and colour have plenty of exceptions. Both undergo complete metamorphosis through egg, caterpillar, pupa and adult, with a butterfly pupa called a chrysalis and a moth's typically wrapped in a silk cocoon. Moths outnumber butterflies roughly nine to one, at around 160,000 described species.
This generator draws from a curated list of real butterfly and moth species across five familiar categories -- Swallowtails, Monarchs & Milkweed Butterflies, Blues, Coppers & Hairstreaks, Silk Moths & Giant Moths, and Hawk Moths & Other Notable Species -- from garden regulars to some of the largest and most striking Lepidoptera on Earth.
Every result here is drawn using crypto.getRandomValues() -- the Web Crypto API's cryptographically secure randomness -- instead of Math.random(), so it's genuinely unpredictable, not just statistically random. Learn more.
Nature lovers and gardeners use it to identify a species to look out for or to plan a pollinator-friendly planting. Teachers and students use it as a quick entomology prompt, and writers, illustrators, and game designers use it to name a character, pattern, or setting detail. It's also a fun way to pick a butterfly- or moth-themed name for a project, pet, or tattoo idea.
Generate draws one butterfly or moth at random from the full pool using the site's cryptographically secure randomness, guaranteed not to repeat whatever result is currently showing in single-result mode. Filtering by category narrows the pool before drawing, and each single result comes with a short description of the species alongside its name.
A sample of what this generator can draw, spread evenly across the full list:
All of them are real butterfly and moth species, including their descriptions -- nothing here is invented.
Yes -- use the filter button to pick one or more of the five categories. Generate will then only draw from species in the categories you've selected.
Not in single-result mode -- each new roll is guaranteed to differ from the one currently on screen.
Yes -- everyday garden butterflies sit alongside giant silk moths, hawk moths, and other notable species from around the world.
Animal · Bird · Insect · Spider · Shark · Marine Creature