Pupil size abnormalities can sometimes signal disease. 1  Glaucoma: A mid-dilated pupil can be a sign of glaucoma.  Aneurysm: An aneurysm that pushes on certain blood vessels in the brain can cause a dilated pupil as well as other symptoms.
Quick Answer. The total lifespan of a lightning bug is anywhere from one to two years. However, the bulk of that lifespan is spent underground in the larval phase. Adult lightning bugs have very short life spans, averaging just two months in the wild. Continue Reading.
The June beetles tend to mature in June, and they are complete adults at that time. So it takes a complete year for them to emerge by spring time. The June bugs are nocturnal because they get attracted to the light, and their lifecycle lasts about three years. The first year of their life is spent underground.