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.
Save. Lightning bugs, also called fireflies or lightning beetles, are known for their ability to blink their taillights on and off. Even the larvae of these beetles have small spots that shine and these organisms are commonly called glowworms as well.Lightning bugs are beneficial insects that eat other insect larvae, snails and slugs. Some adult soldier beetles resemble adult lightning bugs, while sowbugs or pillbugs look like lightning bug larvae.n adult lightning bug (Photinus spp.) is a winged beetle that measures 7/16 to 9/16 inch long. It has a dark-colored soft body with brownish-black wing covers, edged with a light yellow to yellowish orange stripe. A section of the thorax, called the pronatum, extends over the lightning bug's head.