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.
Type: Bug. Diet: Omnivore. Average life span in the wild: About 2 months. Size: Up to 1 in (2.5 cm). Size relative to a paper clip: Fireflies are familiar, but few realize that these insects are actually beetles, nocturnal members of the family Lampyridae.ize: Up to 1 in (2.5 cm). Size relative to a paper clip: Fireflies are familiar, but few realize that these insects are actually beetles, nocturnal members of the family Lampyridae.