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MR Bulk said:
And no thermal problems! I read somewhere they release and mix two different kinds of fluids (like snap'n lite glow sticks) inside their body to make the light. What amazes me (and I never did see'em, just read about'em) is that they can turn the light off at will, too. So how do they do that - poop out the mixed liquid? /ubbthreads/images/graemlins/yellowlaugh.gif
Naw that couldn't be, 'cause you'd see it, still mixed and lit up as it fell to the ground!
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Could it be that they merely cover up the glowing part of their body with a wing cover or something, when they signal? I'm not sure, but I don't think they can turn on/off the chemical light that fast.
Jan
EDIT: Hmm, apparently I'm wrong according to HowStuffWorks