Blue Ghost fireflies ?

[trehopr1]

Some relatives from North Carolina were visiting and they mentioned that they have Blue ghost fireflies in their region (as they are from Western North Carolina).

Is anyone familiar with these ?

They are said to be unique for the color of their lights.

[livingplanet3]

I'd not heard of these, until now -

www.sciencefriday.com/articles/the-eerie-glow-of-blue-ghost-fireflies/