Síocánaí (Shee-oh-kaw-nee)

Cicada

The Síocánaí, often called the “Peacebringer,” is a cicada of rare grace and resonance. Its exoskeleton gleams like aged bronze, laced with intricate metallic patterns that catch even the gentlest light. When it sings, it does not screech or buzz—instead, it produces a layered, melodic hum that echoes through the ancient forests like a prayer. Its song is soft but permeating, a chorus of tranquility that quiets anxious minds and lulls the forest into reflective stillness.
These cicadas prefer old-growth trees where they can rest undisturbed along thick branches or moss-draped bark. Emerging during the warmest months, they often appear in unison, filling the forest canopy with a shared melody that seems to knit the woods together. The harmony of their collective sound is said to reduce aggression in nearby animals and encourage healing in damaged plants. Scholars debate whether this effect is magical or biological—but those who’ve heard it never question its impact.
Anatomically, the Síocánaí boasts a strong, durable body built for protection and vibration. Its wings are translucent and finely veined, folding neatly over a broad abdomen. Tymbal structures on the abdomen create the characteristic sound, which is regulated with surprising precision. Large, red-brown compound eyes and feathery antennae give it a quietly observant presence, and it moves with deliberate stillness when not singing.
Though not sapient, their behavior suggests a shared awareness among groups. They emerge in carefully timed cycles, often returning to the same trees or thickets year after year. Their lifespan above ground is brief, but intensely meaningful. During these weeks, they sing not only to attract mates but to unify the sonic identity of their home. One tree filled with Síocánaí becomes a sanctuary of tone—a place where birds land in silence and even wind shifts to match the rhythm.
Among the people of Tír na nÓg, the Síocánaí is treated as both omen and ally. Its arrival is seen as a sign of alignment between memory, rest, and rebirth. Elders tell children that when the Síocánaí sings, it is the forest remembering all who have walked within it.

Basic Information

Anatomy

The Síocánaí has a robust body with a hard exoskeleton that provides protection and structural support. Its wings are clear with delicate venation, and it has six strong legs equipped with spines for gripping tree bark. The head features prominent compound eyes and antennae.

Biological Traits

This cicada is known for its ability to produce a melodic, musical buzzing using specialized structures called tymbals located on its abdomen. The sound produced is not only a mating call but also a means of creating a peaceful atmosphere in the forest.

Genetics and Reproduction

Síocánaí cicadas reproduce through sexual reproduction, with females laying their eggs in slits they cut into tree bark. The eggs hatch into nymphs, which drop to the ground and burrow into the soil, where they will live for several years feeding on root sap before emerging as adults.

Ecology and Habitats

Síocánaí cicadas are typically found in temperate forests, where they inhabit trees and shrubs. Their preferred environments are those with plenty of old-growth trees that provide ample space for laying eggs and areas for the nymphs to thrive underground.

Dietary Needs and Habits

As nymphs, Síocánaí cicadas feed on the sap of tree roots, while adults primarily feed on plant fluids, using their piercing-sucking mouthparts to extract sap from tree branches and leaves.

Biological Cycle

The life cycle of the Síocánaí includes four stages: egg, nymph, pupa, and adult. The nymph stage can last several years, during which they remain underground, emerging in synchrony with others to transform into adults and continue the cycle.

Behaviour

Síocánaí cicadas are known for their peaceful and harmonious nature. They spend most of their time resting on tree branches, singing their soft, melodious songs that resonate through the forest. Their songs are a form of communication used to attract mates and signal their presence, contributing to the serene atmosphere of their habitat.

Genetic Ancestor(s)

• Beastiary: Mortal Fauna

Scientific Name

Ainmhí; Nádúrtha; Globalis síocánaí

Origin/Ancestry

Originating from the ancient woodlands of Tir na nOg, the Síocánaí has a long lineage that stretches back through countless generations. Its ancestors were among the first to develop the unique, musical buzzing that defines this species today, using their

Average Length

The average length of the Síocánaí is about 4 to 6 centimeters.

Body Tint, Colouring and Marking

The Síocánaí boasts a metallic, bronze-tinted exoskeleton with intricate patterns and markings. Its large, red-brown eyes add to its distinctive appearance, making it easily recognizable among other cicada species.