One of the main drivers of vector-borne disease transmission is the ecology of the insect vector. Changes in climate and landuse alter ecological relationships vectors have with their hosts and parasites / pathogens, resulting in shifts in transmission. Our research applies ecological and evolutionary theory to better understand: 1) the host-vector-parasite / pathogen interaction, 2) key environmental drivers of transmission, and 3) how environmental change will affect vector-borne disease transmission.