Snacker Firefly

What came first, fire or flies? If it was flies, how did people know to call them Fireflies? Or did they just call them"cool black bugs with glowing butts" until fire caught up? More at 11.

Specs: 5(w) x 7(d) x 4.5(h) inches. Polyester fiber, polyethylene pellets, ages 0 and up!