The short answer is clear: the Main Cicada article gives the general backbone of the life cycle; here, linking up with Why Do Cicadas Sing Constantly? The Sound Mechanism, we read cicada egg-laying behavior step by step. Because egg laying, the sound call, mating and underground development are parts of the same chain. Seen through the eyes of a field biologist, the matter is not a single moment but a cycle.

In the classical sense, univoltine means single-generation; but for cicadas the more accurate framework is that the adult stage is short and the development period is long. In some species this wait is in the 1-4 year band; some periodical lineages in North America, on the other hand, wait 13 or 17 years. So the creature we call the cicada becomes visible in summer with a few weeks of sound, but spends the main part of its life hidden.

1) The male’s call attracts the female

In the cicada, the mating scene begins before the moment the male sings. The male holds a territory on a tree trunk or branch with a loud call. This sound is not an advertisement that “persuades the female from a distance”; it is a within-species mating signal. If there are many males in the same habitat, the call intensity rises and a chorus forms. The important clue for a biologist is this: rhythm matters as much as sound strength. The female doesn’t easily turn toward the call of the wrong species. That is why the behavior looks clearer when read together with the sound mechanism article.

2) Mating takes place on a tree branch

Male and female usually mate on a tree branch or trunk. This moment is short; energy is expensive, nature doesn’t like needless dawdling. After mating, the female starts producing eggs. The important distinction here is this: egg laying is not random dropping but a behavior that involves tissue selection. The female chooses a slender twig, the area under the bark or soft plant tissue. Hard, thick and dry surfaces are less preferred. Because the egg needs protection.

3) The female lays the eggs in series

The female’s extension called the ovipositor cuts small slits into the bark of a slender twig. In most species the eggs are laid not one by one but in series of rows. Although the number varies with species and body condition, a range of 50-400 is often cited. This serial way of laying spreads the eggs out instead of gathering them in a single spot; so they are not all lost in the same blow. Cicada egg-laying behavior becomes clear here: the goal is not just to count eggs but to place them in the right microhabitat. The twig the female chooses is the egg’s first shield.

Female cicada laying a row of eggs into twig tissue with her ovipositor
Female cicada laying a row of eggs into twig tissue with her ovipositor

4) The eggs hatch in 6-10 weeks

At a suitable temperature the eggs hatch within 6-10 weeks. This period can shift depending on how dry the twig is, the season and the temperature. The first stage to emerge is the first-instar nymph. It has a small, delicate and short surface phase. This nymph drops down from the twig or trunk. It gets down to the ground on its own and enters the soil. This is where the cicada’s fate changes: life above ground closes, underground life begins. A few hours of chance on the surface become the start of root feeding that will last for years.

Newly hatched first-instar nymph going down into the soil
Newly hatched first-instar nymph going down into the soil

5) The nymph goes underground and lives on xylem

After entering the soil, the nymph reaches plant roots. Its food source is root sap, that is, xylem fluid. This type of feeding is not aggressive; the cicada doesn’t cut up the root, it takes the sap. The effect of individual nymphs is usually low. But if the density rises, stress can develop in young trees. During the long underground period the nymph digs tunnels; these tunnels also contribute to soil aeration. So it does an invisible job: on the one hand it feeds, on the other it works the ground.

6) The waiting period varies by species

In the cicada species seen in Türkiye, the underground period is usually around a few years. Sometimes a range of 1-4 years is seen, and sometimes longer variations. Magicicada, on the other hand, is a separate story. The 13- and 17-year periodical species are endemic to North America. They are not found in Türkiye. The reason is not just “the weather”; it is biogeography, lineage history and ecological distribution. Among the species most often mentioned in the field in Türkiye are Cicada orni, Cicadetta montana and the group also referred to in the literature under the name Tibicen plebejus. Names can change; behavior and habitat are a more reliable clue.

7) Emergence to the surface, molting and exuviae

When the nymph matures, it comes up to the surface. Then it sheds its skin; this is called ecdysis. An empty shell is left on the tree trunk, on a shrub or on a hard surface. That empty shell, that is, the exuviae, is a very strong sign in the field. If you have seen an empty shell on a branch, it is not just that an adult has emerged there; the trace of a long underground period has been left. The adult stage is short: 2-6 weeks in most species. In this short time the main job is mating and egg laying more than feeding. Nature fits a long wait into a short summer window.

8) The ecosystem role through a biologist’s eyes

Reading the cicada only as a noisy summer insect falls short. Nymphs are part of the food chain for predators such as birds, spiders and lizards. Adults can likewise be prey. Underground tunnels loosen the soil; this creates an effect similar to lawn aeration. Very dense nymph emergence can create stress in some trees, but individual insects generally don’t do great harm. So this group should be read not with the label “pest” but through its ecological role. For a biologist the right question is this: what is the creature doing, how much pressure does it exert at which stage, how does it change its habitat?

9) How do you set up a specimen plate in the field?

For this subject the most accurate visual is the specimen plate logic. The egg slit, the first-instar nymph, the soil line and the empty shell should be seen together in one frame. That way the reader builds the cycle at a single glance. In the background there is not the species label but the sequence of behavior. If you read this visual language together with the Main Cicada article, egg-laying behavior merges with sound and the life cycle. That is the full picture.

Specimen plate with an egg slit, a nymph and an empty skin
Specimen plate with an egg slit, a nymph and an empty skin

Source backbone

The clear conclusion of this article is this: cicada egg-laying behavior is not a single action; it is a chain built from the male’s call, mating, laying eggs into twig tissue with the ovipositor, the hatching of the eggs, the nymph going down into the soil and root feeding that lasts for years. Behind the sound you hear in summer lies a long underground story.