<i>Papilio machaon</i> (IMAGE) Pensoft Publishers Caption This image shows Papilio machaon, a species with intermediate temperature requirements (species temperature index = 9.3°C) and a very broad temperature niche (ranging from -3.1°C to 18.6°C) which occurs in most regions in Europe. Credit Martin Wiemers Usage Restrictions CC-BY 4.0 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.