Parasitized Ground Finch (IMAGE) Entomological Society of America Caption This is a medium ground finch (Geospiza fortis) nestling that was killed by Philornis downsi larvae. Damage due to parasitism is visible at the nestling's nostril. Credit P. Lahuatte Usage Restrictions Must credit P. Lahuatte. 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.