The Reasons Behind the Noise of the Cicada

Cicadas, those small insects with gigantic sounds, have puzzled and fascinated people for centuries. You’ve probably heard them on a hot summer day, their buzzing noise resonating through the air. But have you ever wondered why these tiny creatures produce such a loud sound? Let’s explore the reasons behind the noise of the cicada.

Cicadas are known for their unique ability to produce sounds that can reach up to 120 decibels, which is as loud as a rock concert or a chainsaw. So, why do they make so much noise? The primary reason is for mating purposes. Male cicadas use their sound-producing organs called tymbals, which are situated on their abdomen, to attract females. By producing loud mating calls, they aim to stand out from the chorus of other males and catch the attention of a potential mate.

The mating calls of cicadas are species-specific, meaning each species has its distinctive sound. This specialization ensures that cicadas do not accidentally mate with a different species. It’s nature’s way of ensuring reproductive success and maintaining genetic diversity. In some regions, different species of cicadas may even synchronize their mating calls, creating a mesmerizing symphony of sound that can be heard for miles.

The musicianship of male cicadas doesn’t end with their mating calls. Some species also employ a technique called “chorusing” to amplify their sound. By coordinating their calls with other males in their area, they create a powerful resonance that is bound to capture the attention of any nearby females. This chorus effect also serves another purpose – to confuse predators. The loud buzzing from a chorus of cicadas can make it difficult for predators to locate an individual cicada amidst the noise.

Interestingly, the volume of cicada calls is affected by temperature. As temperature rises, their buzzing becomes louder and more frequent. This phenomenon is because cicadas being cold-blooded creatures are dependent on the environment for their body temperature regulation. They are most active when temperatures are high, and this also includes their vocal activity. So, if you find yourself annoyed by cicada noise on a hot summer day, remember that they are simply responding to their surroundings.

Another intriguing aspect of cicada songs is their song pattern. Different species have distinct patterns, such as long buzzes or rhythmic pulses. These patterns are thought to be a result of natural selection. Over time, cicadas with unusual or complex songs may have gained an advantage in attracting mates or deterring predators. The ones that couldn’t produce attractive or effective songs were less likely to pass on their genes to the next generation.

Additionally, the unique structure of a cicada’s body contributes to its ability to create sound. The tymbals, nestled within their abdomen, consist of membranes that can contract and expand rapidly. By rapidly vibrating these membranes, the cicadas create the buzzing sound that we hear. The amplification of this sound occurs when the vibrations travel through the cicada’s body and exit through specialized resonating chambers.

In conclusion, the noise of the cicada is a fascinating aspect of their behavior, deeply intertwined with their reproduction and survival. The loudness and intricate patterns of their songs are primarily used for mating, while also serving as a defense mechanism against predators. So, the next time you hear the buzzing of cicadas on a warm summer day, marvel at the delicate symphony performed by these remarkable creatures and appreciate the reasons behind their noisy melodies.