How to Identify Periodical Cicadas

Get a field guide with pictures. An insect field guide should have color photographs with different types of cicadas including the Periodical Cicadas.

Find a map of the different broods. Search the Internet for brood maps of the different types of Periodical Cicadas. National Geographic has some excellent information on this insect (see link in Resources).

Look for cicada ground holes. The cicadas emerge from the ground through holes, called chimneys, and climb trees to shed their shells and begin the race to mate. The females lay eggs under the bark of branches and then die soon after. Once the cicadas emerge as nymphs, they fall and dig under the ground. Here they will live for seventeen more years feeding off the sap of tree roots.

Distinguish between different species of cicadas by looking at their eyes, size and wing shape. Most Periodical Cicadas have distinct red eyes, but there is one group that has white eyes. The typical dog-day cicadas have darker colored eyes. Many Periodical Cicadas also have red or orange outlines on the wings. The wings are different on each species.

Determine the species of the cicada. The Periodical Cicadas are different from the typical yearly dog-day cicadas. Three different periodical cicada species have a life cycle of thirteen years and four different species have a life cycle of seventeen years.

Check out the calendar when you first see cicadas. Periodical Cicadas come out in May and June whereas dog day cicadas come out in late June through August.

Listen to the song of cicadas. Search the Internet for sound files of these loud cicadas. Each species has a slightly different sound.