Elephant Bird Bone Tool Marks (image) Zoological Society of London Share Print E-Mail Caption Close up of the disarticulation marks on the base of the tarsometatarsus. Here you can see the v-shaped tool mark and rough edges indicating a stone tool was used. Credit ZSL 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.