The project is aimed at applying pastoralists’ knowledge to find water bodies during the dry season and accurately identify aquatic habitats that can be treated with larvicide pyriproxyfen (PPF) to render the sites unproductive to mosquitoes in rural communities of Tanzania, where malaria is mostly endemic. Dry season mosquito aquatic habitats are very few, scattered over wide landscape and very hard to locate. Relying on pastoralists knowledge (crowd sourcing) who use these habitats to water their cows/animals guarantee successful identification of these habitats. The objective of the project was to 1) recruit pastoralists with knowledge of local dry-season water bodies into the study; 2) educate the selected pastoralists on the safety of PPF to human and animal health; 3) assess the impact of the intervention on mosquito populations at aquatic habitat and household levels, 4) conduct educational sessions with pastoralists and non-pastoralists communities on better animal keeping practices, with help from District