Lizard basking in the sun (IMAGE) Stellenbosch University Caption Some animals, such as lizards, tortoises and insects, will encounter thermal stress as a result of climate change. In a recent paper, researchers from South Africa and Australia provide several tools to validate and improve indices that determine the vulnerability of these animals to climate warming. Credit Dr Susana Clusella-Trullas Usage Restrictions No restrictions. License Public Domain 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.