Members of the Anopheles gambiae 1000 Genomes Consortium present findings from a copy number variant analysis in that malaria parasite vector mosquito. The team did whole-genome sequencing on 1,142 An. gambiae samples, focusing in on 250 CNVs impacting 267 genes. When they took a closer look at the genes affected by CNVs, the investigators focused in on 44 CNVs that showed up in five gene clusters previously implicated in metabolic resistance to insecticides.