Tiny Plant Enemies May Set Global Patterns of Biodiversity (image) Washington University in St. Louis Share Print E-Mail Caption This is an exit hole drilled in a black oak acorn by an insect that lays its egg on the developing flowers and hatches inside the acorn. Shot at the Tyson ForestGEO plot in Eureka, Missouri. Credit Photo: Jonathan Myers Usage Restrictions Please credit. 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.