Can You Hear the Difference Between Morning and Evening Cicadas?
🕐 7 min read | 🌍 Natural Wonders
🔒 Key Takeaways
- Different cicada species are biologically programmed to call at specific times of day, creating distinct dawn and dusk choruses.
- The morning chorus can reach up to 100 decibels — louder than a motorcycle — and is dominated by species like Neotibicen canicularis.
- Temperature directly controls cicada calling: most species begin singing when air temperature crosses 18–20°C and peak activity shifts as the day heats up.
- Some cicada species, like the evening cicada (Tanna japonensis in Japan), sing exclusively at dusk in a haunting, descending wail that signals nightfall.
Close your eyes on a hot Indian summer evening and you'll notice something astonishing: the insect orchestra playing at 6 AM sounds nothing like the one at 6 PM. Morning and evening cicadas aren't just singing at different times — they are often entirely different species, tuned by millions of years of evolution to claim their own acoustic territory. Understanding morning vs evening cicadas sound is like learning to read a living, breathing clock written in pure vibration.
What Makes Cicadas Sing in the First Place?
Cicadas produce their iconic sound using a pair of drum-like organs called tymbals, located on the sides of their abdomen. Rapid muscle contractions buckle these ribbed membranes inward and outward up to 300–400 times per second, generating that unmistakable buzzing pulse. The hollow abdomen acts as a resonating chamber, amplifying the sound to extraordinary volumes. Crucially, only male cicadas sing — every chirp, buzz, and wail you hear is a mating advertisement directed at silent females hidden in the canopy. Different species have evolved structurally distinct tymbals, producing calls with unique frequencies, pulse rates, and temporal patterns. These differences are so precise that female cicadas can identify their own species' call even in a deafening multi-species chorus. This acoustic fingerprinting is the foundation of why you hear such different soundscapes at different times of day.
The Morning Chorus: Dawn's Deafening Alarm
The pre-dawn and early morning hours belong to some of the most aggressive acoustic performers in the cicada world. In North America, species like Neotibicen canicularis (the dog-day cicada) ramp up calling as soon as light intensity crosses a critical threshold, often before temperatures have fully risen. In South and Southeast Asia, large Cryptotympana species unleash a wall of high-frequency sound that can exceed 100 decibels by 7 AM, rivaling a running chainsaw. The morning chorus tends to be sharper, more urgent, and higher in pitch — scientists believe this is because cooler morning air carries high-frequency sound more efficiently over distance. Males calling early may also face less competition, giving a strategic acoustic advantage to early risers. Studies in Japan found that morning-calling species cluster their peak activity between 5–9 AM, forming a predictable, species-specific acoustic window. Dawn truly belongs to the boldest buzzers.
🤔 Did You Know?
A single cicada chorus can reach 120 decibels at close range — equivalent to a rock concert — making cicadas among the loudest insects on Earth.
The Evening Chorus: Dusk's Haunting Wail
As shadows lengthen and temperatures begin to fall, an entirely different cast of cicada performers takes the stage. In Japan, the evening cicada Tanna japonensis produces one of the most emotionally evocative insect sounds on Earth — a melancholy, descending cry that has inspired haiku poets for centuries. Evening-calling species tend to produce lower-frequency, pulsing calls that carry beautifully through the cooling, denser evening air. In India and across tropical Asia, Pomponia and Dundubia species ramp up at dusk, creating a shimmering, reverberating chorus that swells as darkness approaches. The evening chorus is generally more layered and complex than the morning one, because multiple species often overlap their calling windows in the transitional light. Some researchers describe the dusk soundscape as acoustically richer — more species packed into a narrower time window as they race to call before full darkness silences them. If morning cicadas are an alarm clock, evening cicadas are a haunting lullaby.
Why Do Different Species Sing at Different Times?
The phenomenon of species partitioning the day into distinct acoustic time slots is called temporal niche partitioning, and it is one of nature's most elegant solutions to competition. If every cicada species called at exactly the same time, females would be overwhelmed trying to identify the right species' song amid a cacophonic blur. By evolving to call at different times of day, species effectively carve out their own broadcasting window with far less acoustic interference. A landmark 2009 study published in Behavioral Ecology documented at least five sympatric cicada species in a single forest in Japan, each with a calling peak offset by roughly 2–3 hours from the next. This temporal spacing was so precise that it could not be explained by temperature preferences alone — it was genetically hard-wired behavior. Evolutionary pressure from female selectivity has been the driving force, making time itself a resource that cicadas have learned to divide and conquer.
Temperature, Light, and the Cicada Clock
While genetics sets the schedule, the environment fine-tunes it every single day. Most cicada species have a critical temperature threshold below which calling stops entirely — for many temperate species this is around 18–20°C, while tropical species often require at least 25°C. Light intensity acts as the starter's pistol: photoreceptors in cicada eyes detect the brightening of dawn and the dimming of dusk with remarkable precision, triggering hormonal cascades that initiate or suppress calling behavior. On overcast days, the timing of peak chorus can shift by 30–60 minutes compared to clear days, because cloud cover alters both temperature and light cues simultaneously. Humidity also plays a role — very high humidity can dampen tymbal vibrations and reduce calling intensity. Climate scientists have begun using cicada calling times as bioindicators: when species start calling earlier in the season or at unusual hours, it signals shifts in regional temperature patterns that can be cross-referenced with meteorological data.
Can Humans Actually Hear the Difference?
The fascinating answer is yes — with a little practice and attention, any person can learn to distinguish the morning and evening cicada choruses. The morning chorus in most of the northern hemisphere and tropical Asia has a sharper, more piercing quality, dominated by continuous high-frequency tones in the 4,000–8,000 Hz range. The evening chorus is typically more pulsed and rhythmic, often in the 2,000–5,000 Hz range, giving it a warmer, more undulating character. Bioacoustics apps like iNaturalist and Merlin (adapted for insects) can now spectrographically analyze recordings and identify individual species from their unique call signatures. Researchers at Purdue University have demonstrated that untrained volunteers could correctly identify morning vs. evening recordings 78% of the time after just 15 minutes of guided listening. The key sonic cues are pulse rate (how fast the buzz repeats), frequency peak (high vs. low pitch), and envelope shape (does the sound swell gradually or burst suddenly?). Your ears, it turns out, are surprisingly good cicada detectors.
What the Cicada Chorus Tells Scientists About Climate Change
The shifting timbre of the cicada chorus is emerging as one of the most sensitive natural indicators of climate disruption. Long-term acoustic monitoring studies in Japan spanning 40 years have shown that the evening cicada Tanna japonensis has shifted its peak calling time 30 minutes earlier than it did in the 1980s, directly correlated with rising summer temperatures. In the United States, periodical cicadas (Magicicada species) have been documented emerging years ahead of their 13- or 17-year cycles in regions experiencing significant warming — a phenomenon called stragglers becoming leaders. A 2021 paper in PNAS found that a 2°C rise in mean summer temperature could compress the acoustic time windows of competing species, forcing overlapping choruses that disrupt mating signals and potentially reduce reproductive success by up to 30%. Citizen science programs like the Cicada Safari app have enrolled over 400,000 volunteers in North America alone to log cicada emergence times, building a massive dataset that complements satellite temperature records. The humble cicada, singing its ancient song, has become an unlikely sentinel of planetary change.
Final Thoughts
The next time you step outside on a summer morning or evening, stop and truly listen — what you're hearing is not random noise but a precisely choreographed acoustic symphony millions of years in the making. Morning cicadas and evening cicadas are nature's living clock, and the subtle differences in their calls encode information about temperature, evolution, competition, and even the health of our climate. Share this article, download a bioacoustics app, and challenge yourself to hear the difference tonight — once you do, summer will never sound the same again.
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Frequently Asked Questions
Why do cicadas make noise in the morning and stop midday?
Many cicada species reduce calling during the hottest midday hours because extreme heat can damage their delicate tymbal muscles and increase water-loss risk. Calling activity typically resumes in the late afternoon as temperatures moderate, creating a second peak before dusk.
What cicada makes noise at night or evening?
Several species are crepuscular or early-nocturnal callers, including Tanna japonensis in Japan and certain Dundubia and Pomponia species across South and Southeast Asia. These evening cicadas produce distinctively lower-pitched, pulsing calls that are well-adapted to carry through the cooler, denser nighttime air.
Do different cicada species come out at different times of day?
Yes — this is called temporal niche partitioning, and it is a well-documented phenomenon in cicada ecology. Studies have recorded up to five sympatric species in a single forest each maintaining a distinct peak calling window offset by 2–3 hours, reducing acoustic competition and helping females identify the correct mate.
How loud are cicadas in the morning versus evening?
Morning choruses are often slightly louder in raw decibel terms, with some tropical species exceeding 100 dB at close range during peak dawn calling. Evening choruses may feel subjectively richer or more complex because multiple species overlap in the transitional light, even if individual species call at slightly lower intensities.
Can climate change affect when cicadas sing?
Absolutely — long-term studies in Japan show that rising temperatures have pushed the evening cicada's peak calling time 30 minutes earlier over 40 years. Warmer springs are also causing periodical cicada species in the US to emerge years ahead of their expected 13- or 17-year cycles.
📚 Further Reading & Research Sources
The following journals and institutions publish peer-reviewed research on the topics covered in this article:
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