Successful Spider Cities Require Just the Right Mix of Females

Within the colonies of brownish-orange social spiders called Anelosimus studiosus, females fall into one of two behavioral types: aggressive or docile. These pea-sized spiders make cobwebby nests that range “anywhere from the size of a golf ball to the size of a Volkswagen Beetle,” says Jonathan Pruitt from the University of Pittsburgh. They live along […]