I received some orange heads awhile back. I split the group into two.
One of the groups went belly up in the past couple of days...
Care conditions:
I was keeping them in a gallon jar with sphagnum substrate, placed in an incubator.
Incubator runs 35 C or a bit higher.
They had a mite problem that I was going to deal with when I had opportunity.
The jar lid had perforations, but there was another container sitting on top of it.
There are 2 other jars of roaches in the same conditions (N. cinereous and H. flexivitta - lobsters and giant lobsters) and both were fine.
No major change i