Saw an interesting phenom last night. As we were driving past an unmown field, I saw a lot of "ghostly" glows flickering over the field. They appeared sort of bluish white and were flickering on and off. After going back for a second look we realized that they were fireflies in higher densities than we had even noticed before.

Very eerie and very beautiful.

Could phenomena like this have led to "ghost" sightings?