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.
Life Cycle of a Housefly. While some houseflies can live up to two months, their average life expectancy is between 15 and 30 days. Unfortunately, living in the warmth and having access to food as these insects do in a home extends their longevity. Because they do not live long, they complete their life cycle quickly.