The main objective of this training is to help researchers in the world working on population assessment to have a good knowledge on how to use and how work Distance software. Distance sampling is one method using point or line transect for collecting data in the field. Many researchers from different country or institutions working on different taxa attended this workshop. The training was given by the experts on Distance Sampling from the University of St Andrews. Back in Madagascar, he used (and will continue to use) his newly learned skills to analyse our existing data, and design future research on reptiles and other species within our organization.