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.
What is the lifespan of a dragonfly? A: The typical dragonfly's life span is roughly 6 months from the time the egg is laid until it dies as a fully-grown adult, although some larger types can live up to a few years. Much of a dragonfly's life is spent underwater as a larva. Continue Reading.