Reunion Island regularly faces outbreaks of epizootic haemorrhagic disease (EHD) and bluetongue (BT), two viral diseases transmitted by haematophagous midges of the genus Culicoides (Diptera: Ceratopogonidae) to animals of economic importance such as cattle, sheep and goats. To date, ¿ve species of Culicoides are recorded in Reunion Island: Culicoides bolitinos, C. enderleini, C. grahamii, C. imicola, and C. kibatiensis. Although epizootics and Culi-coides diversity are already well documented, abundance and seasonality of the ¿ve species are not. According to a recent viral screening of local Culicoides populations (unpublished data), at least four species are involved in the transmission of each virus. Therefore, cha-racterizing the risk period by modelling the temporal dynamics of the ¿ve Culicoides species is a key step to better understand BT and EHD epidemiology and improve their control. Between 2016 and 2018, 55 biweekly Culicoides catches using OVI traps were set up in 11 sites. A hurdle model (i.e. a presence/absence model combined with an abundance mo-del) was developed for each species in order to determine climatic and environmental drivers of presence and abundance of Culicoides. Regarding abundance, average Culicoides catch per site ranges from 4 to 45,875 indivi-duals. Also, diversity differ between sites with C. imicola being dominant at low altitu-de and C. kibatiensis at high altitude. A marked seasonality is observed for the 3 other species. Eleven meteorological and environmental determinants were used to model presence and abundance of each species: temperature, humidity, rain, wind, global ra-diation, vegetation index, eco-climatic area, land use, farm density, animal density and length of nearby watercourse. The association of these determinants to explain presence and/or abundance depends on the species, but each plays a role in at least one species. This is the first study to model Culicoides population dynamics in Reunion Island. In the ab