Robots are fast gaining significance as the object used by military and other agencies for carrying out spying and what better than a robot which knows when to hide itself from humans while spying on them. The surveillance robots are sensible enough to keep themselves safe from the gaze of their target by approaching them under cover of darkness. These robots are smart enough not to venture into well-lit areas and sentries in order to avoid detection.

The surveillance robots move on four small wheels and know well when to hide, just like human spies. I know it all is sounding directly out from the fiction book, but you have to believe it.
New Jersey-based company Lockheed Martin, which is known for designing aircrafts and another equipments for army demonstrated the robot late last year at its Advanced Technology Laboratories at Cherry Hill. The company has the potential to develop robots which can complete the mission assigned to them covertly and any such device will be of great help for the security agencies.
Lead engineer Brian Satterfield said that the robot was designed to operate within four constraints:
"Avoiding visible detection by sentries of known locations, avoiding potential detection by sentries whose positions were unknown, avoiding areas in which the robot would have no means of escape, and, as this robot was designed to run at night, avoiding areas that were well lit."