Updated: September 7, 2025

Red eyed cicadas inspire curiosity about their behavior and their interactions with humans when they appear in large numbers. Many observers wonder if these insects bite or sting people during these gatherings. This article explains what these cicadas can do to humans and what they cannot do, and it provides practical guidance for safe and respectful observation.

What you should know about cicadas

Cicadas are remarkable insects that inhabit many regions of the world. They feed on plant sap using specialized mouthparts and rarely interact with people in ways that cause harm. The large emergences in some years attract crowds of observers and create a memorable outdoor experience.

Cicadas belong to a group of insects with an ancient lineage. The red eyed cicadas are part of a genus that is known for vivid eye coloration and distinctive acoustic signaling. Their life cycle includes long periods underground followed by rapid adult emergence during warm months. The behavior of these insects in the open air is shaped by hunger for sap and by mating rituals that unfold in crowded trees.

The biology of red eyed cicadas

Red eyed cicadas are medium sized insects with robust bodies and transparent wings. The red appearance of their eyes is a distinguishing feature that helps identify these cicadas in the field. Adult cicadas use their wings to amplify sound and to attract mates through intricate songs produced by the males.

The life cycle of these insects includes eggs laid in tree branches, nymphs that live underground for many years, and adults that live for a shorter period above ground. During their brief adult stage they feed little or not at all on trees and shrubs but focus on reproduction. The loud chorus produced by males is a signature sign of a cicada season.

Do cicadas bite humans

Cicadas do not bite humans as a regular behavior. Their mouthparts are adapted to pierce into plant tissue for the purpose of drawing sap. When a cicada contacts human skin it may cause a light pinch only if the insect happens to grasp skin while moving. In typical encounters the insect simply alights and remains harmless.

Despite the potential for contact during handling, cicada bites are not a common or harmful event. The primary risk to a person is the potential for a minor surface abrasion if someone is rough or tries to squeeze a cicada. In ordinary scenarios a cicada does not attempt to bite or feed on human flesh or blood.

How cicadas bite compares to other insects

The biting or piercing apparatus of cicadas resembles that used for feeding on plant sap rather than on animal tissue. Other insects such as mosquitoes and ticks are specialized to obtain blood from vertebrates. A cicada mouthpart is not adapted to drawing blood from humans. Consequently a cicada does not pose a blood feeding risk and does not present venom like some stinging insects.

When a cicada interactions with people occur it is usually a calm contact. If a cicada is resting on a person and flights away rather than attempting to bite into skin, the encounter is not stressful and requires no medical attention. The absence of a biting habit distinguishes cicadas from many other insects that visit humans with the intent to feed.

Behavior during emergence seasons

Emergence seasons draw millions of cicadas to the surface and to tree canopies. These periods feature loud and persistent sound produced by male cicadas to attract mates. The behavior during these times is dominated by feeding on sap and mating activity rather than aggressive actions toward humans.

Cicadas tend to avoid close contact with humans when possible. Their daytime activity centers on trees where they can safely perch and sing. The large numbers of individuals can create a dramatic visual and acoustic landscape without elevating danger to people.

How to respond if a cicada lands on you

If a cicada lands on a person allow it to move away on its own. The insect does not intend to bite or sting and is simply using the body as a resting place. Remaining calm minimizes the chance of startling the insect and reduces the likelihood of a pinching sensation.

Do not squeeze the cicada or try to pry it away aggressively. A gentle hand motion usually frees the insect from skin contact without harm. If a cicada happens to pinch by accident wash the skin with mild soap and water and dry it gently.

Practical safety tips when cicadas are nearby

  • Do not attempt to crush or trap any cicada on the skin

  • Allow the insect to depart on its own when possible

  • Move slowly when approaching trees with buzzing cicadas

  • Keep children supervised and explain that these insects are harmless

  • Wash hands after handling objects that were in contact with cicadas

Health and safety considerations

Cicadas pose minimal health risks to humans. They do not transmit diseases to people in most environments. Allergic reactions to cicadas are rare and typically arise from skin irritation caused by contact during handling rather than from the bites themselves.

In public spaces such as parks or public trails the main concerns are crowding and the chaotic movement of large numbers of insects. Proper spacing and calm behavior help maintain safety for both people and cicadas. It is prudent to wear light clothing and to avoid distracting the insects with loud noise or sudden movements.

The science behind red eye pigment

Red eye coloration in these cicadas is a conspicuous diagnostic feature that helps researchers and enthusiasts identify the species. The pigment in the eye structures contributes to how the insect perceives light and motion in its environment. The crimson hue remains visible under a variety of lighting conditions and during the insect life cycle.

Scientific observation of red eyed cicadas has revealed patterns of behavior that correlate with their sensory systems. The eyes play a role in how cicadas detect predators and locate mates. The coloration is therefore a meaningful trait that has persisted through evolutionary time.

Myths and facts about cicadas bites

A common myth is that red eyed cicadas routinely bite or sting people. The facts support the opposite conclusion. These insects feed on plant sap rather than animal tissues, and they pose little danger to humans when encountered in normal circumstances.

Another misconception is that cicadas carry and spread diseases through bites. There is no evidence to support this claim. The ecological impact of cicadas arises mainly from their enormous numbers and the temporary disturbance during mating seasons rather than from any direct harm inflicted by feeding on people.

Notable regional differences in cicada behavior

Different regions experience varying patterns of cicada emergences. In some areas the timing of the chorus shifts with climate and seasonal warmth. The density of the emergence also varies due to local ecological conditions and predation pressures.

Predators such as birds and small mammals respond to abundance in predictable ways. In some regions the presence of many cicadas temporarily influences local ecosystems by altering insect and plant dynamics. Even so the basic behavior that cicadas do not seek human contact remains consistent across regions.

How to observe cicadas safely

Scientific observation and citizen science both benefit from careful practice. Observers should minimize disturbance to the insects and avoid interfering with mating behavior. A calm and patient approach allows for better natural history observations without altering cicada activity.

When photographing or recording songs limit your proximity to dense clusters of cicadas. Use neutral observing positions and avoid rapid movements. The result is a richer understanding of cicada life while preserving the welfare of the insects and the enjoyment of the observers.

Conclusion

Red eyed cicadas do not bite humans as part of their normal behavior. Their life cycle and ecological role center on sap feeding from trees and mating signals that occur in crowded canopies. Observers can enjoy these seasonal visitors while respecting their needs and preserving a safe environment for all.

These insects remain a fascinating subject for study and appreciation. Understanding their biology helps people separate fact from fiction and fosters a thoughtful approach to interacting with the natural world.