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 actually consist of more than 2,000 species in the family of Lampyridae. The name lightning bug is also commonly used for fireflies because of their bioluminescence. Research shows that some species of fireflies are considered at risk in certain areas of the world because their natural habitats are being destroyed.