The Hickory Horned Devil caterpillar is the larval form of the Regal Moth. It's the largest caterpillar in the world, reaching up to 5 inches in length, or roughly the size of a hot dog! 
 
The original image was taken by Jim McCormac and featured in the Columbus Dispatch. Jim is an Ohio naturalist and photographer. The back of this sticker cites his original work, including a QR code to his blog post about the Hickory Horned Devil: https://jimmccormac.blogspot.com/2011/07/hickory-horned-devil.html
 
Design was edited by Blinque's owner, Jen Lichtefeld. Original image used with permission from Jim McCormac. The Hot Hickory Dog! design is a weatherproof vinyl sticker with a glossy finish.