A Finch in the Galapagos (image) University of Utah Caption A male medium ground finch sits on a tree branch in Ecuador's Galapagos Islands. A new University of Utah study shows that when these birds are exposed to two alien parasites -- the pox virus and nest fly -- their immune systems are activated, raising hope they can defeat the parasites and avoid extinction. Credit Jen Koop, University of Utah. Usage Restrictions None 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.