Mesotriton alpestris (IMAGE) Helmholtz Association Caption During the mating season early in the year, the males of the Alpine newt (Mesotriton alpestris) exhibit blue coloring on their backs. Credit Photo: Dieter Florian Usage Restrictions None 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.