Fire Ant Biting Lizard (IMAGE) Penn State Caption Fire ants can bite and sting fence lizards, which is stressful to the lizards and sometimes lethal. The new study found that lizards whose ancestors were exposed to fire ants have improved immune function when exposed to stress, which might prepare lizards for potential wounding from fire ant attacks. Credit Langkilde Lab, Penn State Usage Restrictions Image credit must be provided alongside image. 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.