OrnamenTrap Yellow jacket Insert, What it catches: All major yellow jacket species found in North America. How it works: Works inside the OrnamenTrap decorative cover to lure and trap all major species of yellow jackets. Simply add water and the attractant packet will dissolve, luring yellow jackets to their demise. What kills the insects: Lured by the water-soluble attractant packet, yellow jackets enter the trap and can’t get out. Eventually, they drown in the water. Made in the USA. For use West of the Rockies.