As the Atlantic Forest shrinks, mosquitoes are turning to humans as their primary blood source. This shift could accelerate the spread of mosquito-borne diseases and make forest-edge communities more vulnerable to outbreaks. Credit: Shutterstock Running along Brazil's coastline, the Atlantic Forest supports an extraordinary range of life, including hundreds of species of birds, amphibians, reptiles, mammals, and fishes. Much of that richness has been lost. Human development has reduced the