In the wild, animals make loud calls to signal their desirability for mates. Humans do something similar, but instead of showing off how bangable we are, we yell in order to sell hot dogs.

These dudes are hot dog purveyors at Wrigley Field. Every day, they wander the aisles of the stadium in order to entice people like you and me to slurp down a mustard-soaked glizzy. While they’re not in *real* competition with each other, they still pride themselves on how their call differs from the other sellers in the area.

Here’s what those calls sound like: