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.
Fireflies are not flies at all, but they are kinds of beetles. They are also called lightning bugs. Firefly eggs hatch into little wormlike creatures called larvae. Some kinds of larvae glow in the dark, and those that do are called glowworms.