I am actually doing an experiment to answer this question with ghost mantids. I don't know if my results will apply to every species though, although they might.
- MantisGirl13
FYI, L1 Chinese mantids have a horrible die off rate. If you want to ensure that your mantis will not randomly die, wait until it is L2 or L3.
- MantisGirl13
I've heard this too, however I have kept groups of ghosts at the same humidity and they all turned out different colors. There isn't enough evidence that it is humidity that determines color.
- MantisGirl13