Researchers from UCL’s Extreme Citizen Science Research Centre will present on the latest developments of the Sapelli mobile data collection software, through which non-literate communities contribute to knowledge co-production practices addressing problems and issues that are important to them, in some of the most critical environments on Earth. This involves case studies including a recent project with Maasai warriors in Kenya who collect data for flora, and a 15 minute practical demonstration of using Sapelli on pre-prepared phones. This will be followed by a 15 minute Q&A and drinks, hosted by Oxford Centre for Tropical Forests (OCTF).