|MadSci Network: Zoology|
There's a couple of reasons that could explain why your fireflies aren't
lighting up. Firstly, they're not in what you might call their "natural
environment" - being crowded into a container might alter their behaviour a bit.
More importantly, fireflies use their glowing abdomens to find mates - if it's not mating time, there's no reason for them to burn up a bunch of energy for nothing!
I did a quick search of the web - this site suggests that if you're not getting much fire from your fireflies, try putting them in a jar, and then placing that jar in some warm water. That sounds plausible to me - insects are cold blooded, and not very active at lower temperatures. Be careful not to use water that's too hot though!
Hope that helps!
Rob Campbell, MAD Scientist
Try the links in the MadSci Library for more information on Zoology.