Preface de Houiller -- Acknowledgements -- 1 Introduction -- 2 Natural history of the processionary moths (Thaumetopoea spp.): new insights in relation to climate change -- 3 Climate warming and past and present distribution of the processionary moths (Thaumetopoea spp.) in Europe, Asia Minor and North Africa -- 4 Genetic diversity and structure at different spatial scales in the processionary moths -- 5 Modeling the spatio-temporal dynamics of the pine processionary moth -- 6 Insect - Tree interactions in Thaumetopoea Pityocampa -- 7 Ecological responses of parasitoids, predators and associated insect communities to the climate-driven expansion of the pine processionary moth -- 8 Medical and veterinary impact of the urticating processionary larvae -- 9 Development of Environment-Friendly Strategies in the management of Processionary Moths.