Mena2.jpg (IMAGE) Stanford University Caption Venn diagram shows species recorded in Stanford's Jasper Ridge Biological Preserve by three methods: camera traps, analysis of genetic material left behind in soil and genetic material left behind in animals' feces. Credit Meyers, et al. / Frontiers in Ecology and Evolution Usage Restrictions Credit Meyers, et al. / Frontiers in Ecology and Evolution 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.