I think humidity might also be a part of it. I keep hundreds of P. nivea in one container and it's always wet in there. I can open the lid and play around for hours and nobody flies out. If they crawl up my arm though, then I get a little concerned, but I've maybe lost only one or two when working in the container. Incidentally these were both while packing up orders.some roaches seem to need to be at a minimum temperature to start flying. sorta, at any rate. kind of makes sense to me as temp could heavily influence their metabolism and available energy. i definitely notice that all my feeders are very easy to catch midwinter and fairly frustrating mid summer, for like land speed
Maybe the high humidity would explain how I can open my container (with 100s in it) and none fly out. I keep the substrate wet. I see them walk up to the Vaseline and then stop. I have some Gyna lurida (Porcelain Cockroach [Yellow Form]) with wet substrate and the adults fly out like crazy. When they do this they become food for my other arthropods.I think humidity might also be a part of it. I keep hundreds of P. nivea in one container and it's always wet in there. I can open the lid and play around for hours and nobody flies out. If they crawl up my arm though, then I get a little concerned, but I've maybe lost only one or two when working in the container. Incidentally these were both while packing up orders.
Probably this, I'm assuming. http://www.bioquip.com/search/DispProduct.asp?pid=2871AThere is stuff sold on the net, that you paint onto the top part of the enclosure, and it dries. It looks white, and is a bug barrier that they cant get a grip on. I cant remember what it is, but remember seeing it when i first joined this site. I am looking to get some of it, because i want to use it on my lobster roaches. Hopefully someone who knows will chime in, and help out.
Probably this, I'm assuming. http://www.bioquip.com/search/DispProduct.asp?pid=2871A
The stuff works great for keeping ants in their enclosures, I've never used it for anything else though as I only have dubia. It's expensive but I've used it MANY times and I still have quite a bit left. Works great for insects that can climb, but are not 100% experts at doing so.