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.
When it comes to adult fireflies, researchers believe bioluminescence serves two purposes: to attract a mate and to attract prey. Lightning bug blips happen in the blink of an eye, and while our eyes canât tell the difference, female lightning bugs know what theyâre looking for.