Where can you find information about the 17-year cicadas?

See the hgic.umd.edu link to the right. THis link has some good information. They show up in late May and can last two to six weeks. 17-year Cicadas come out in mass in heavily wooded areas. They number anywhere from 100,000 to 1 million during the cycle, depending on fires of the last 17 years. They are harmless, but make lots of noise.