Black cockroach.

In the course of a few days ago, walked through a small forest. I
This cockroach picks up in the cracks of the leaves but I can't confirm whether this type of cockroach lives on the tree. This cockroach circled before me, I had trouble taking pictures. Because I'm not a researcher,
I do not know exactly whether this cockroach will harm humans?
Hopefully someone will explain about this type of cockroach.