Biodiversity loss makes mosquitoes hungrier for human blood, Brazilian researchers have concluded following DNA analyses of mosquitoes caught in two fragmented nature reserves in the Atlantic Forest near Rio de Janeiro (Frontiers in Ecology and Evolution, 15 January). Of the 1,714 mosquitoes caught, representing 52 species, 145 females had taken a blood meal, and 18 of the 24 identified blood meals from those mosquitoes – including the forest mosquito and yellow fever vector Psorophora ferox (pictured) – came from humans. The remaining six came from birds, one from an amphibian, and one each from a canid and a mouse.