Insect bait traps are effective tools for capturing a wide variety of insects, including butterflies, beetles, ants, flies, mosquitoes, etc. The principle behind bait traps is their use of an attractant that lures insects based on their natural inclinations towards certain smells or substances. Bait traps offer an effective means to monitor and control insect populations. They can provide valuable data on the presence and abundance of certain species, aiding in ecological studies and pest management strategies.