The MalariaGEN Vector Observatory is a global collaborative project to establish an open access resource of Anopheles genome variation data, focusing primarily on species that are major vectors of human malaria. The Observatory is made up of multiple partner studies that each contribute mosquito specimens for genome sequencing. This data is part of a pre-publication release. For information on the proper use of pre-publication data shared by the Wellcome Trust Sanger Institute (including details of any publication moratoria), please see http://www.sanger.ac.uk/datasharing/