Cicada identification starts with a few visible clues: a broad head, prominent eyes, clear wings held rooflike over the body, and, in many adults, a loud call. Learning how those features change across life stages can help distinguish cicadas from common lookalikes in gardens and outdoor spaces.
What features identify an adult cicada?
Adult cicadas are sturdy insects with a short, broad body and a large head. Their two pairs of membranous wings are usually transparent or lightly tinted, with visible veins; at rest, the wings generally lie over the abdomen like a tent. The forewings are longer than the hindwings. This wing shape is often more useful than color, which varies among species and can fade or look different under changing light.
Look for widely spaced, conspicuous eyes on the sides of the head and short antennae between or near them. Cicadas have a beaklike piercing-sucking mouthpart, called a rostrum, tucked beneath the head. Adults use it to feed on plant fluids. Do not handle an unfamiliar insect to inspect its mouthparts; observe it where it is, or use a clear photograph taken from a safe distance.
Many adult cicadas are several centimeters long, but size alone is not a dependable identification clue. Species differ by region, and males and females may look similar. Color patterns, wing markings, body proportions, and local distribution can narrow the possibilities, but a photograph may not show enough detail for a confident species-level identification.
How do cicada nymphs and shed skins look?
Cicadas spend much of their lives as nymphs underground, feeding on fluids drawn from plant roots. A nymph has a compact, brownish body, small eyes, and strong front legs adapted for digging. Those forelegs are broad and shovel-shaped, a distinctive clue when the insect is visible. Nymphs do not have the long, fully developed wings of adults; developing wing pads may appear on older individuals.
Before emerging as an adult, a mature nymph climbs a tree, fence, wall, or other upright surface and molts. The empty outer covering, called an exuvia, often remains attached nearby. It resembles a hollow brown cicada with split seams along the back and prominent digging legs. Exuviae are useful evidence that cicadas emerged in the area, but they cannot reliably identify a species on their own.
Adult emergence is seasonal, with timing dependent on species, climate, and location. Some cicadas appear annually, while periodical species emerge in large, synchronized broods after years underground. An emergence pattern can support an identification, but local timing varies and should not replace examination of the insect’s features.
Which insects are commonly mistaken for cicadas?
Several insects share a general resemblance to cicadas, particularly when seen briefly or from a distance. Compare body shape, wings, legs, and behavior together rather than relying on one feature.
| Lookalike | Clues that distinguish it |
|---|---|
| Leafhopper | Usually much smaller, often wedge-shaped, and quick to jump; wings may be held rooflike. |
| Katydid | Has enlarged hind legs for jumping and often leaflike wings; antennae are typically very long. |
| Grasshopper | Has conspicuous, powerful hind legs and a more elongated body; adults may have colored or opaque wings. |
| Annual or periodical cicada nymph skin | Hollow and dry, with a split back and digging forelegs; it is a shed casing, not a living adult. |
Some planthoppers and other true bugs can also have clear wings or prominent eyes. A sharp, close photograph can help, but location and scale matter: include the insect’s surroundings or a nearby object for size reference without placing anything against it.
Can a cicada be identified by its sound?
Sound is a valuable clue, especially when adults are high in trees or hidden by foliage. In most species, males produce calls using paired structures called tymbals on the abdomen. The sound may be a steady buzz, a pulsing drone, or a sequence of clicks and tones. Females generally do not make the same calling sounds, though they may produce noises when disturbed.
A loud chorus can indicate that cicadas are active nearby, but sound alone rarely confirms a species. Calls vary among species and regions, and background noise or distance can distort what you hear. If recording a call, note the location, date, time, and nearby habitat. Pair audio with photographs of visible individuals where possible, then compare observations with a regional field guide or local natural-history resource.
How can you make a useful cicada observation?
Start with the broad identification: adult cicada, nymph, or shed skin. For an adult, record body color and pattern, approximate size, wing transparency and markings, eye color, and whether it was calling. For a nymph, note its digging forelegs and whether wing pads are visible. For an exuvia, photograph the back and side so the split and leg shape can be seen.
- Take clear photographs from above and from the side, using natural light when possible.
- Include the date and general location; regional species ranges can be important.
- Record whether the insect was on a tree trunk, shrub, wall, or near the ground.
- Avoid disturbing or collecting an unidentified insect simply to improve a photograph.
- Use a regional guide or consult a local entomology group when a species-level answer matters.
Identification confidence should match the evidence. A blurry image may support “cicada” while leaving the species uncertain; a clear view of wing venation, body markings, and location may allow a closer match. If the insect’s features are hidden, report the uncertainty rather than treating a color resemblance or emergence date as proof.