Malaria continues to be a persistent threat to the health of Madagascar’s people. Effective control necessitates efficient vector surveillance. Laxity has lethal consequences. Mosquito control across the island has historically focused on reduction of, and protection from, malaria vectors that feed and rest indoors. In spite of evidence suggesting that outdoor resting and feeding mosquitoes could be involved in malaria transmission in this county, surveillance protocols continue to emphasize endophilic vectors, leaving gaps in our understanding of the role of exophilic mosquitoes.We deployed a modified barrier screen trap, the QUEST (QUadrant Enabled Screen Trap), in conjunction with a novel assay we call BLOODART (BLOOdmeal Detection Assay for Regional Transmission) to sample exophilic vectors in the Madagascar Highland Fringe. We captured a total of 1252 female Anopheles mosquitoes (10 species), all of which were subjected to BLOODART analysis. QUEST collection produced a heterogenous distribution of mosquito density, diversity, host choice, and Plasmodium infection. The mosquitoes in this collection frequently exhibited multiple blood feeding behavior (MBF) (46.4%), and a shift in the overall percentage of humanpositive bloodmeals from December 2017 to April 2018 (27% to 44%). Plasmodium positivity (prevalence = 6%) was found primarily in vectors considered to be of secondary importance, indicating a need to account for these species in routine surveillance efforts.We modeled the potential impact of multiple blood feeding behavior on common transmission metrics, including the entomological inoculation rate, the vectorial capacity, and the proportion of living infectious vectors in a mosquito population. These models suggest that multiple host contact could act as a force multiplier for malaria transmission.