Dale Clayton and Sarah Knutie, University of Utah (image) University of Utah Share Print E-Mail Caption University of Utah biology professor Dale Clayton and doctoral student Sarah Knutie conducted a study showing that finches in Ecuador's Galapagos Islands will collect cotton balls treated with a mild pesticide and use them to build their nests, killing parasitic fly maggots that often kill baby birds. Here, Knutie holds one of the cotton dispensers. The method might provide a way to help protect threatened or endangered finches, other birds and even small mammals. Credit Nick Steffens, University of Utah Marketing and Communications Usage Restrictions None Share Print E-Mail 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.