BCI plot census 2015 Big tree_Mattson.jpg (IMAGE) Smithsonian Tropical Research Institute Caption Measuring the largest rainforest trees requires carrying a ladder out into the jungle, often to hard-to-access sites. Long term forest monitoring plots such as the Smithsonian's ForestGEO network use standard techniques to measure giant trees. However, in remote areas, researchers may decide to leave the biggest trees out of their studies, because it is too time-consuming to measure them. Credit Sean Mattson, STRI Usage Restrictions Credit: Sean Mattson, STRI 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.