Some people use field guides to identify birds, butterflies, or other wildlife. University of California, Davis, biologist Jonathan Eisen wants to give microbe hunters a similar aid, reports Wired Science's Daniela Hernandez. As a kid, as Eisen recounted at a talk during the American Association for the Advancement of Science's annual conference, he used to go around with binoculars and a guide book to find as many animals as he could.