Whether they are actively trying to get out or not seems to be more temperature dependant. I pot them individually to identify, and most have to be coaxed with a feather from the egg boxes into the pots.
Great thread, we have a young visitor from America at the moment, he is studying nature and ecology, I will show him this I'm sure he will find it fascinating.
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What moth do you think this is? I can't claim to have caught it!