The snakes observed appear to accept the robot as real, with one snake even biting the robot's head, according to researchers.

CNN: April 4, 2012 -- Updated 1350 GMT (2150 HKT)

Taylor, professor of Computer Sciences at Johns Hopkins University have tried another tack by making a tiny snake-like robot go where endoscopes have gone before and focused on making a fully articulated tip.

CNN: Snake robots slither to the rescue