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.
The dragonfly is an insect that has inhabited the earth for several years â almost 300 million years to be exact. There are more than 5000 species of dragonflies that exist today. There are many people who believe that these insects live only for a day. This however is not true. At the shortest the life cycle of a dragonfly from egg to the death of the adult is about six months.