  In this paper we consider efficiency of self-reproducing extraterrestrial
Von-Neumann micro scale robots and analyse the observational characteristics.
By examining the natural scenario of moving in the HII clouds, it has been
found that the timescale of replication might be several years and even less -
making the process of observation quite promising. We have shown that by
encountering the interstellar protons the probes might be visible at least in
the infrared energy band and the corresponding luminosities might reach
enormous values.
