Response Codes (VIDEO) Society for Experimental Biology This video is under embargo. Please login to access this video. Caption This video shows four different responses that the penguins displayed; 1 shows waking up with no other reaction and 2-4 show increasing aversive responses, with 4 being the strongest fleeing response. Credit Tessa van Walsum Usage Restrictions Freely available with attribution to Tessa van Walsum, University of Roehampton, UK. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.