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.
June bugs, also called May or June beetles, go through a life cycle that spans one to three years. Adult beetles emerge from the ground at the end of spring or start of summer. After feeding for several weeks, they lay their eggs in the ground. After two to three weeks, grubs hatch.