Abstract: A 3D insect device is described which comprises a preferably water-resistant body that can assume a folded position and then unfolded to expand into a true 3-dimensional structure with one or more elements to either attract or repel flying nuisance and pest insects like flies, mosquitoes, moths, beetles etc or to attract beneficial insects. The structure preferably simulates comparable shape, size and color as occurring in nature, having significant effects on the instincts of the target insects. The 3D device shape is supplemented with one or more of insect attractant colors, tacky agents, food attractants, pheromones, fragrances and aromas, insecticides, and repellents. Water-resistant, preferably biodegradable materials permit both indoor and outdoor use. The device design significantly improves convenience of use while reducing unintended contact of non-targets such as users, children, pets or wildlife with the contact surfaces.