Updated: July 8, 2025

Cicadas are fascinating insects, well-known for their distinctive sound and periodic appearances. Among the various species, the red-eyed cicada stands out due to its striking red eyes, which often draw curiosity—and sometimes fear. A common question that arises is whether red-eyed cicadas bite or sting. This article aims to separate myths from facts and provide a clear understanding of these intriguing insects.

Understanding the Red-Eyed Cicada

Red-eyed cicadas belong to a group of cicadas characterized by their prominent red eyes. These insects are part of the Cicadidae family and are closely related to other cicada species that emerge seasonally in large numbers.

Cicadas are primarily known for their loud and rhythmic calls produced by males to attract females. The red-eyed cicada shares this behavior, often becoming very noticeable during their active periods. Their large size and bright eyes often make them seem menacing, which contributes to misconceptions about their potential danger.

Common Myths About Red-Eyed Cicadas

Myth 1: Red-Eyed Cicadas Bite Humans

One of the most widespread myths is that red-eyed cicadas bite humans aggressively. People encountering these insects often worry about painful bites or potential infections.

Myth 2: Red-Eyed Cicadas Can Sting Like Wasps or Bees

Another myth is that these cicadas possess stingers similar to bees or wasps and can deliver painful stings.

Myth 3: Red-Eyed Cicadas Are Dangerous to Humans

Due to their large size and intimidating appearance, some assume red-eyed cicadas pose a health threat through biting or stinging.

The Truth About Red-Eyed Cicada Behavior

Do Red-Eyed Cicadas Bite?

The short answer is no. Red-eyed cicadas do not bite humans in any harmful manner. While they have mouthparts designed for piercing plant stems to feed on sap, these are not suited for biting human skin.

Cicadas use specialized mouthparts called a proboscis—a straw-like structure—to suck fluids from trees and plants. The proboscis is slender and sharp enough to penetrate plant tissue but not strong enough to break human skin effectively.

If a cicada accidentally lands on your skin, it might probe with its proboscis, but it cannot bite you as a mosquito or tick would. Any sensation you feel is likely very mild and temporary.

Do Red-Eyed Cicadas Sting?

Red-eyed cicadas do not have stingers, unlike some other insects like bees, wasps, or hornets. Their anatomy does not include any organ capable of delivering venom through stinging.

The confusion about stinging may arise because of the cicada’s sudden movements or loud buzzing sounds when disturbed, which can startle people and create an impression of aggression.

Are They Dangerous?

In general, red-eyed cicadas are harmless to humans. They do not transmit diseases nor cause allergic reactions through biting or stinging.

The primary impact of cicadas is ecological: they serve as food for many predators and contribute to soil aeration when they emerge from underground nymph stages.

Why Do People Fear Red-Eyed Cicadas?

The fear surrounding red-eyed cicadas mostly stems from their appearance and behavior:

  • Large Size: Adult cicadas can be quite large (up to 2 inches), making them seem intimidating.
  • Bright Red Eyes: The striking red eyes can appear eerie or alien-like.
  • Loud Noise: Male cicadas produce loud calls that can reach up to 100 decibels.
  • Mass Emergence: Cicadas often appear in huge numbers during mating seasons, overwhelming areas temporarily.

These factors combined can lead people unfamiliar with them to believe they are dangerous.

Ecological Role of Red-Eyed Cicadas

Rather than being pests or threats, red-eyed cicadas play important roles in ecosystems:

  • Food Source: Birds, mammals, reptiles, and other insects rely on cicadas as a food source during emergence periods.
  • Soil Health: When cicada nymphs emerge from underground tunnels, they help aerate the soil.
  • Plant Population Dynamics: By feeding on tree sap in moderation, they contribute to natural pruning without significant damage.

Understanding these roles helps reduce fear and encourages coexistence with these beneficial insects.

What To Do If You Encounter a Red-Eyed Cicada

If you come across a red-eyed cicada:

  • Observe Calmly: They are unlikely to harm you.
  • Avoid Handling Excessively: While harmless, rough handling may stress or injure the insect.
  • Keep Pets Away: Although not harmful to pets either, curious animals might try to bite them.
  • Let Them Be: These insects have short adult lifespans focused on mating; respect their role in nature.

Addressing Additional Concerns

Can Cicada Mouthparts Cause Allergic Reactions?

There is no scientific evidence that cicada mouthparts cause allergic reactions in humans. Since they do not bite or inject saliva into human skin, unlike mosquitoes or ticks, allergies related to bites are not a concern.

Can They Damage Property?

Red-eyed cicadas may cause minimal damage by laying eggs in small tree branches (a process called oviposition). However, this usually does not threaten healthy trees significantly.

Are Red-Eyed Cicadas Harmful To Pets?

No credible evidence suggests that red-eyed cicadas harm pets by biting or stinging. Pets may find them interesting but should not be exposed excessively as ingestion of any insect can sometimes cause mild digestive upset in animals.

Conclusion: Separating Myths From Facts

Red-eyed cicadas have long fascinated human observers due to their unique appearance and behaviors. However, many myths circulate about their potential danger—specifically regarding biting or stinging humans.

Facts:

  • Red-eyed cicadas do not bite humans.
  • They do not sting; they lack any stinger.
  • They are generally harmless and play an important ecological role.
  • Their mouthparts are specialized for feeding on plant sap only.

Myths:

  • They aggressively bite people — false.
  • They can sting like bees or wasps — false.
  • They pose health risks through bites/stings — false.

By understanding the true nature of red-eyed cicadas, we can dispel unwarranted fears and appreciate these insects as remarkable components of our natural world rather than threats.


References for further reading:

  • University entomology departments
  • Insect ecology textbooks
  • Scientific articles on cicada biology