Mosquitoes are vectors of major human diseases from malaria to arbovirus like dengue or West Nile virus. Even if these vector-borne diseases are mainly present in tropical and sub-tropical regions, they also represent a new risk for temperate countries due to globalisation of trafic and trade, change in land-use and climatic changes. However, we are still lacking data on their development and particularly on vector biology and capacity of adaptation. In that context, the main goal of this project is to organise two workshops, one in Europe (Belgium) and the other one in South-East Asia (Cambodia, Lao PDR) to deal with the development of mosquitoes, and associated epidemiological risk, in relationships with change in habitat linked to deforestation and urbanisation and to climate change in these areas. Common methodology of survey and sampling will be also discuss and prospective common projects. Indeed, even if Cambodia, Laos, France and Belgium present different climatic and land-use conditions, they present similarities concerning demography, extension of urban zones and the impact of agriculture on natural habitats including a high level of fragmentation. Moreover, several invasive species originated from South-East Asia are now present in Europe or are extended their distribution locally. It could be then worth full to exchange on concepts about invasive species and habitat shift but also to share methodologies of survey and risk assessment practices. Based on keynote presentation, oral communications of search results, round tables and field visits, we intend to share data, around several transmission models (malaria, dengue, chikungunya and japanese encephalitis) , to discuss about concepts and prepare new research projects on these topics. These workshops will reinforce the collaboration between the four countries and exchanges of expertise about a major concern dealing with public health and biodiversity