The 3D Printed Hornet, Yellow‑Legged Hornet, Wasp, and Yellow Jacket Trap is a durable, reusable, chemical‑free solution designed to fit any standard Mason‑jar opening, turning an ordinary jar into a highly effective insect trap. Its precision‑printed funnel top guides invasive hornets and nuisance wasps into the jar, where they cannot escape, making it ideal for backyard protection, apiaries, and outdoor workspaces. This trap is optimized for species‑specific baiting: Hornets and Yellow‑Legged Hornets respond best to protein baits such as fish scraps or raw chicken; Wasps are attracted to sweet liquids like sugar water or fruit juice; Yellow Jackets prefer a mix of sweet bait early in the season and protein bait later in summer. Lightweight and easy to hang, this trap offers an efficient, eco‑friendly way to reduce aggressive stinging insects. Keywords: 3D printed hornet trap, yellow‑legged hornet trap, wasp trap, yellow jacket trap, Mason jar trap, hornet bait, wasp control, outdoor insect trap, beekeeping hornet defense.