The only all-in-one, environmentally responsible answer for battling wasps, hornets and yellow jackets. The trap is proven to catch Paper Wasps, Red Wasps, Bald-faced Hornets, European Hornets and Yellow Jackets. Two-week supply of attractant is included. The Rescue. Wâ¢Hâ¢Y Trap catches insect queens in early spring before they build nests, and foraging workers from late spring through summer and fall. Refill Attractant Kits available. For outdoor use only.