Do Cicadas Bite or Sting?: Unmasking the Myths
Cicadas, those noisy summer insects, are fascinating, but their buzzing presence often leads to questions about their behavior. Do cicadas bite or sting? The definitive answer is: No, cicadas do not bite or sting humans. Their mouthparts are designed for piercing plants and sucking fluids, not for defense against or attacking larger animals.
Understanding Cicadas: A Brief Introduction
Cicadas are insects belonging to the order Hemiptera and are known for their distinctive buzzing or clicking sounds, particularly during the summer months. These sounds are primarily produced by male cicadas to attract mates. There are two main types of cicadas: annual cicadas, which appear every year, and periodical cicadas, which emerge in cycles of 13 or 17 years. These emergence cycles are believed to be a survival strategy to avoid predation.
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The Cicada’s Mouthparts: Built for Sap, Not Biting
The reason cicadas don’t bite or sting lies in their specialized mouthparts. Unlike insects with biting jaws or stinging ovipositors, cicadas possess a piercing-sucking proboscis. This proboscis is a straw-like structure that they use to tap into plants, particularly trees, and extract sap. Think of it like a tiny built-in juice straw. It is not adapted for biting or puncturing skin for defensive purposes. They are interested in plant fluids, not human blood or flesh.
Why the Misconception About Biting?
The misconception that cicadas might bite likely arises from a few factors:
- Size and Appearance: Cicadas are relatively large insects, and their prominent eyes and robust bodies can appear intimidating to some.
- Accidental Pricks: While they don’t bite intentionally, a cicada might accidentally try to probe human skin with its proboscis, mistaking it for a plant. This can feel like a slight prick but isn’t a true bite.
- Fear and Anxiety: The sheer number of cicadas during emergence years can create a sense of anxiety, leading people to assume they are aggressive.
Cicada Defenses: Not Bite or Sting Related
Since cicadas don’t bite or sting, they rely on other defense mechanisms:
- Camouflage: Many cicadas are colored to blend in with their environment, making them harder for predators to spot.
- Overwhelming Numbers: Periodical cicadas emerge in vast numbers, a strategy known as predator saturation. This means that there are so many cicadas that predators can’t possibly eat them all, ensuring the survival of many individuals.
- Startle Response: Cicadas may also startle predators by suddenly flying away or making a loud noise.
Cicadas and Humans: A Mostly Harmless Relationship
Generally, cicadas pose no threat to humans. They don’t spread diseases, and their feeding habits rarely cause significant damage to mature trees. In fact, their emergence can even have some benefits:
- Soil Aeration: As nymphs (juvenile cicadas) burrow underground, they aerate the soil.
- Nutrient Cycling: When cicadas die, their bodies decompose and release nutrients back into the soil.
- Food Source: Cicadas are a food source for birds, reptiles, and other animals, contributing to the ecosystem’s food web.
However, in rare cases, young trees can be damaged by female cicadas laying their eggs. The females slice into small branches with their ovipositor to deposit their eggs. While this isn’t a bite, it can cause the branch to die.
Cicada Facts
| Fact | Description |
|---|---|
| ————————– | ————————————————————————— |
| Life Cycle | Varies from 2-17 years depending on the species. |
| Sound Production | Males use tymbals to create their distinctive songs. |
| Diet | Sap from plant roots (nymphs) and tree branches (adults). |
| Emergence Triggers | Soil temperature reaching a specific threshold triggers mass emergence. |
| Ecological Role | Important food source, contribute to soil aeration and nutrient cycling. |
Frequently Asked Questions (FAQs)
What does a cicada’s proboscis look like?
A cicada’s proboscis is a long, thin, straw-like structure that folds neatly under its body when not in use. It’s a marvel of biological engineering, perfectly designed for piercing plant tissue and extracting sap. When feeding, the cicada extends the proboscis and uses it to tap into the plant’s vascular system.
Can a cicada’s legs hurt or scratch?
While cicadas don’t bite or sting, their legs can be a bit prickly. They have small spines on their legs that help them grip onto trees and other surfaces. If a cicada crawls on your skin, you might feel a slight scratching sensation, but it’s not harmful.
Are cicadas poisonous?
Cicadas are not poisonous to humans or animals. They don’t produce any toxins that would cause harm if ingested. Some people even eat cicadas, especially during mass emergence years.
What happens if a cicada lands on you?
If a cicada lands on you, there’s no need to panic. Simply gently brush it off. They are clumsy fliers and may have just landed on you by accident. Remember, they have no interest in harming you.
Are cicadas dangerous to pets?
Generally, cicadas are not dangerous to pets. Pets might eat cicadas, but they are not toxic. However, consuming large quantities of cicadas could potentially cause digestive upset in some animals.
Do cicadas damage trees?
While cicadas primarily feed on tree sap without causing significant harm to mature trees, female cicadas lay their eggs in tree branches, which can cause minor damage to young trees. Protecting young trees with netting during cicada emergence can prevent this.
Why are cicadas so loud?
Male cicadas produce their loud buzzing sounds to attract mates. They use special structures called tymbals, located on their abdomens, to create these sounds. The sounds are amplified by their hollow abdomens.
How long do cicadas live?
The lifespan of a cicada varies depending on the species. Annual cicadas live for 2-5 years, mostly as nymphs underground. Periodical cicadas live for 13 or 17 years, also mostly as nymphs. The adult stage only lasts for a few weeks.
Are cicadas good for the environment?
Yes, cicadas play a role in the environment. Their emergence can aerate the soil, and their decaying bodies release nutrients back into the soil. They also serve as a food source for various animals.
Can cicadas carry diseases?
Cicadas do not carry or transmit diseases to humans or animals. They are not vectors for any known pathogens.
How can I get rid of cicadas?
You typically do not need to “get rid” of cicadas. Their presence is temporary, and they are not harmful. Insecticides are generally not recommended as they can harm other beneficial insects and the environment.
Are cicada shells dangerous?
Cicada shells are not dangerous. They are simply the exoskeletons that cicadas shed as they grow. They are harmless and will eventually decompose.