Earth is home to over 20,000 caterpillar species, found in every corner of the globe except Antarctica. While most are harmless, some species are just as dangerous as venomous snakes. Their defenses ...

Photographed in the jungles of Colombia, this neon green caterpillar will one day turn into an Automeris moth. While beautiful, its spines are actually venomous. Photo by: Rhett A. Butler, 2007.

What Happens When You Touch a Venomous Neon Caterpillar. Posted: June 23, 2025 | Last updated: June 23, 2025. Vibrant and deceptively beautiful, this neon caterpillar packs a venomous sting.

The hickory horned devil — a neon-turquoise caterpillar that can grow to be the size of a hot dog and is crowned with menacing black-tipped red horns– is an uncommon find in Pennsylvania.