Catches all major species of yellow jackets common to North America. The trap consists of a two-layer durable plastic bag with a scientifically designed molded plastic entry structure that prevents escape. A powerful water-soluble attractant is included; you simply add water to the trap and hang it outside. Yellow jackets are lured by the attractant scent and fly into the bag through the yellow entry structure. Once the trap is full, the top cap closes shut and the entire trap can be placed in the garbage. For outdoor use only.