Why don't luna moths have mouths?
Show answer & explanation
Answer: Adult stage doesn't eat
They absorb nutrients through skin — Wrong. Luna moths don't absorb nutrients through skin. They literally don't eat as adults—they survive on energy stored from their caterpillar stage.
Genetic mutation over time — Wrong. Lack of mouthparts isn't a mutation—it's evolved adaptation. As adults, luna moths live only 7-10 days solely to mate and reproduce, not to feed.
Adult stage doesn't eat ✓ — Correct! Adult luna moths emerge with no mouth, digestive system, or way to eat. They survive entirely on fat reserves stored as caterpillars. Their only purpose: find a mate and reproduce within one week. This strategy works—they invest all energy into reproduction, not feeding!
More Insects questions
- Why can artificial night light trick Aedes albopictus eggs into skipping winter dormancy?
- How can artificial night light both hurt some mosquitoes over winter and raise near-term risk for people?
- What does a Culex mosquito do instead of blood feeding when it enters winter diapause?
- Streetlights can keep Culex mosquitoes biting into fall. What signal gets scrambled?
- How does a young stick insect regrow a lost leg?
- Why are some ants' jaws so fast?