Are Dog-Day Cicadas Noisy? Understanding Their Calls

When summer rolls in and the temperature rises, many people notice a distinctive, persistent buzzing or droning sound coming from trees and shrubs. This sound is the signature call of the dog-day cicadas, insects known not only for their fascinating life cycles but also for their notable noise levels. But are dog-day cicadas truly noisy? And if so, what’s the purpose behind their calls? In this article, we explore the nature of dog-day cicadas’ sounds, why they make them, and how to understand their unique acoustic presence during the hottest months of the year.

What Are Dog-Day Cicadas?

Dog-day cicadas get their name from their peak activity period, which coincides with the “dog days” of summer—the hottest and most humid days typically occurring from late July through August. These insects belong to the family Cicadidae and are found throughout much of North America.

Unlike many other insects that are active at night, dog-day cicadas are diurnal, meaning they are active during the day—especially in sunny, warm weather. Their most recognizable trait is their loud, continuous call produced by males to attract females.

How Noisy Are Dog-Day Cicadas?

Dog-day cicadas are among the loudest insects in the world. Their calls can reach noise levels up to 100 decibels or more at close range—roughly equivalent to a lawnmower or a motorcycle engine. This makes them particularly noticeable when they inhabit areas with dense tree cover or suburban neighborhoods.

The noise produced by cicadas is created by specialized structures called tymbals located on the sides of the male’s abdominal base. These tymbals are ribbed membranes that vibrate rapidly when muscles contract and relax around them. The vibrations amplify through the insect’s hollow abdomen, creating that characteristic buzzing or clicking sound.

While individual cicadas produce a loud noise, it is often the collective chorus of thousands of cicadas calling simultaneously that creates an overwhelming wall of sound. This chorus can fill entire neighborhoods or forests during peak season.

Why Do Dog-Day Cicadas Make Noise?

The primary purpose of dog-day cicada calls is reproductive: male cicadas sing to attract females for mating. Each species of cicada has a distinct call that helps females identify males of their own kind.

Mating Calls

The loud buzzing song serves as a beacon to females seeking mates. The intensity and pattern of calls can signal a male’s fitness and help females select suitable partners.

Territorial Signals

In addition to attracting mates, some aspects of cicada calls serve as territorial signals to warn rival males away. Different calls or bursts may indicate dominance or discourage competition.

Species-Specific Communication

Different species produce subtle variations in rhythm, pitch, and duration that help maintain species boundaries and prevent interbreeding.

Understanding the Structure of Dog-Day Cicada Calls

Dog-day cicada songs consist primarily of rapid pulses or clicks arranged in patterns lasting several seconds. The typical call often includes:

• Rattling trills: Continuous rapid pulses creating a buzzing effect.
• Pulsed bursts: Short sequences of amplified clicks.
• Quiet intervals: Pauses between phrases for breathing or listening.

Each species’ call varies slightly in tempo, pitch (frequency), and repetition rate.

Frequency Range

Cicada calls generally fall within 3 kHz to 20 kHz frequency ranges—well within human hearing but often perceived as high-pitched buzzing. The dog-day cicada typically produces calls near the mid-range frequencies around 4–10 kHz.

When Are Dog-Day Cicadas Most Vocal?

As their name suggests, dog-day cicadas are most vocal during the hottest parts of summer—the “dog days.” Their activity peaks on sunny afternoons when temperatures rise above 80°F (27°C).

They tend to become silent during cooler weather or rainstorms due to reduced muscle activity needed for sound production.

Peak calling periods usually last about 4-6 weeks during midsummer before adult cicadas die off after reproducing.

Impact of Noise on Humans and Wildlife

Dog-day cicadas can be both fascinating and frustrating because of their loud calls.

For Humans

• Annoyance: Prolonged loud buzzes can irritate some people, especially those sensitive to noise.
• Nostalgia: Many associate cicada songs with memorable summer experiences.
• Noise Interference: In rare cases, large populations may drown out other sounds such as conversations or television outdoors.

For Wildlife

• Communication Masking: Loud cicada choruses might interfere with bird songs and other animal communication.
• Predator Attraction: Some predators like birds use cicada sounds to locate prey.

However, most wildlife have adapted to coexist with these seasonal sounds without significant disruption.

How to Minimize Cicada Noise If Needed

If dog-day cicada noise becomes too intrusive around homes or outdoor spaces, consider these tips:

• Soundproofing: Use double-paned windows or heavy curtains to reduce indoor noise.
• Landscaping: Limit planting dense hardwood trees favored by cicadas near living areas.
• Background Noise: Outdoor fountains or white noise machines may mask cicada sounds.

Keep in mind that dog-day cicadas do not bite or sting and pose no physical threat beyond noise annoyance.

Fascinating Facts About Dog-Day Cicadas

• They spend most of their lives underground—up to 2-5 years—feeding on tree root sap before emerging as adults.
• Adult dog-day cicadas live only about 4 to 6 weeks above ground.
• Only males produce calls; females remain silent.
• Cicada calls can vary regionally due to environmental factors influencing development.

Conclusion

Are dog-day cicadas noisy? Absolutely. Their loud, buzzing calls define summer soundscapes in many regions where they appear. However, these acoustic signals serve important biological functions related to mating and species recognition rather than mere noise pollution.

Understanding why and how dog-day cicadas make these sounds can increase appreciation for this remarkable insect’s place in nature’s orchestra. While their chorus may sometimes seem overwhelming, it is a seasonal reminder of nature’s complex communication systems unfolding right outside our windows each summer.