Are There Cicadas in Indiana?

Where Cicadas Are Found in Indiana

Cicadas live throughout Indiana, though you are most likely to encounter them in deciduous woodlands and forested areas. The Wabash River drainage system supports large populations, as does the Ohio River valley in the south. Indiana's state parks, including Tippecanoe River State Park and Turkey Run State Park, host active cicada populations each year. Urban and suburban areas with mature trees also attract cicadas. The Hoosier National Forest contains excellent cicada habitat, especially in areas with hickory, oak, and maple trees. These insects are not limited to forests. They inhabit gardens, parks, and residential neighborhoods wherever trees provide suitable feeding grounds. Cicadas depend on tree roots during their underground nymph stage, so any area with established trees can support them. For more on cicada in Indiana, see ourIndiana cicada guide.

When Cicadas Are Active in Indiana

In Indiana, annual cicadas typically emerge in mid-July and continue through August, reaching peak activity in late July and early August. Periodical cicadas follow their own schedule, emerging on a 13-year or 17-year cycle depending on the brood. When a periodical brood emerges, which happens roughly every other year in some part of Indiana, the sound can be overwhelming. The chorus is primarily a mating call, with males producing the loudest sounds during the hottest parts of the day. Adult cicadas live for only a few weeks after emerging. Their nymphs develop underground for 2 to 17 years, drawing nutrients from tree roots. Most people notice cicadas only during their brief adult stage when they produce their famous buzzing and whirring sounds. You can also browseIndiana wildlife.

Identifying Cicadas

Cicadas in Indiana range from about one and a half inches to over two inches in length. Most annual cicadas have black or dark brown bodies with transparent wings held tent-like over their backs. Periodical cicadas, particularly the 13-year and 17-year broods common to Indiana, display red eyes, black bodies, and red-marked wings. The most distinctive feature is their wing structure. Cicada wings have a complex vein pattern that makes them appear transparent with visible lines. Males produce sound using specialized structures called timbals on their abdomens. Females are generally quieter and may be harder to spot than the louder males. Looking closely, you can also see their piercing mouthparts, which they use to extract fluids from tree xylem.

Where Sightings Concentrate in Indiana

In Indiana, cicadas concentrate in mature deciduous and mixed forests where oak, hickory, and maple trees dominate. The limestone bluffs along the Wabash River corridor harbor dense populations. Areas around lakes such as Tippecanoe Lake in northern Indiana attract cicadas, as do the shaded woodlands of Brown County State Park. Urban sightings are common in Indianapolis, Bloomington, and other cities with established tree canopies. Neighborhoods with large, old-growth trees report the most cicada activity and noise. The forests of the Hoosier National Forest in south-central Indiana see particularly strong cicada presence. Riparian zones along rivers and streams provide ideal habitat. You may also find cicadas in smaller numbers in parks with scattered trees, though the loudest choruses occur where forest cover is densest.

Cicada Behavior and Diet

Cicadas are herbivores that feed exclusively on tree sap. Both adult cicadas and their underground nymphs use their needle-like mouthparts to pierce plant tissues and extract xylem fluid. For most of their lives, cicadas remain hidden underground as nymphs, drawing nutrition from tree roots. During this lengthy underground stage, they molt several times as they grow. When they finally emerge as adults, they have only weeks to find mates and reproduce. Males gather in groups and produce their characteristic buzzing and humming sounds to attract females. The sound is generated by rapid vibrations of timbals, specialized abdominal structures. Females respond to males by moving toward the sound or sometimes by flicking their wings. After mating, females lay eggs in slits in tree bark, completing the reproductive cycle.

Coexistence and Safety

Cicadas are harmless to humans. They do not bite, sting, or attack. They are not venomous. The noise they produce, while loud and persistent, is simply a natural behavior related to mating and communication. Cicadas can cause minor damage to young trees when females lay eggs in branches, but this typically affects only small branches and rarely causes serious harm. For homeowners concerned about egg-laying, young trees can be protected with netting during peak emergence times. Established, healthy trees easily recover from cicada damage. Most ofIndiana's wildlifeincludes these insects as a normal and beneficial part of the ecosystem. Cicadas serve as an important food source for birds, spiders, and other animals. Their presence is a sign of a healthy environment with mature trees. There are no special precautions needed beyond simply appreciating their presence from a distance.

Species Often Confused With Cicadas

Several insects are commonly mistaken for cicadas in Indiana. Grasshoppers and crickets are similar in size but have different body shapes and produce sound differently. Cicadas have broader, more strong bodies and transparent wings, while grasshoppers have powerful hind legs suited for jumping. Cicada killers, which are large wasps, are sometimes confused with cicadas themselves, though they are predatory insects that hunt cicadas. Katydids resemble grasshoppers more than cicadas and produce high-pitched songs rather than the buzzing of cicadas. Some people confuse the whirring sound of helicopter seeds from trees with cicada calls. Learning the typical shape, wing pattern, and distinctive buzzing sound of true cicadas helps you distinguish them from these other insects. Field guides specific toIndianainsects provide excellent visual comparisons and sound recordings.

Frequently Asked Questions

What causes the extremely loud buzzing sound that cicadas make? The sound is produced by male cicadas using specialized structures called timbals on their abdomens. Rapid contractions of timbals create vibrations that produce the characteristic buzzing and humming chorus.

How long do cicadas live above ground? Adult cicadas typically live for only three to four weeks after emerging. They spend the vast majority of their lives as nymphs underground, developing for 2 to 17 years depending on the species.

Are cicadas dangerous to pets? Cicadas are not toxic or venomous. Pets may eat cicadas without ill effects, though some pets may experience mild digestive upset. There is no need to prevent pets from interacting with cicadas. Checkour wildlife guidefor more information on local animals.

When should I expect to hear cicadas in Indiana? Annual cicadas typically create noticeable choruses from mid-July through August, with peak activity in late July. Periodical brood emergences follow their own schedules and occur on different years.