The rainforest is a very special classroom for both #ethnobiologists and local people. Field studies involving researchers and villagers allow the comparison of local knowledge and scientific knowledge, as here in the measurement of DBH (diameter at breast height), a standard measure of tree trunks, carried out by a #Baka villager and a biologist from the University of Yaoundé. #Cameroon (2010)© Takanori Oishi #photography #rainforest