The 33rd SFDP Congress will be held at Saint-Etienne from October 19th to 22nd, 2021. For this edition, the emphasis will be given on sound communication and bioacoustics (the science of animal and human sound signals) and introductory workshops will be organized. Art workshops as well as an exhibition of photographs and sculptures will be also proposed and we are honored to welcome Professor Frans de Waal for a free general public conference.