The Rattleback Crawler, called “Shon-Haka” by the Orlanda Tribe, is a soft-bodied arthropod native to the leaf-dense floor of the Tropical Forest in the Asari Region of the Habitual Belt on VOI 700 D. Though small and slow-moving, it is instantly recognizable by the distinct vibrations it emits through the ground, warning larger animals and companions alike of its presence or potential danger.

Rattleback Crawlers are non-aggressive but have developed a rhythmic pulsing motion — part bluff, part balance mechanism — which mimics a rattling pattern when disturbed. This motion, combined with its earthy coloring, has made it a notable component of the local ecosystem and folklore, often seen as a sign that the forest is “watching.”

• Size: 18–22 cm in length
• Weight: 0.3–0.5 kg
• Body: Segmented, soft exoskin covered in bristle-like hairs
• Coloration: Dull brown with rust-red patches, mossy green striations along the back
• Speed: 0.6 km/h (crawling), unable to swim

• Vibration Organs: Specialized abdominal muscles generate low-frequency tremors
• Rhythmic Motion: Capable of producing a rattling effect by swaying in a patterned rhythm
• Bristled Sensory Hairs: Detect air pressure and ground vibrations from several meters away

• Armor Class (AC): 10
• Hit Points (HP): 5
• Speed: 10 ft.

• None (Passive Creature)

• Rattleback Defense: When threatened, emits a ground tremor in a 10-ft. radius; creatures must succeed on a DC 11 Insight check to recognize it as harmless
• Early Warning System: If within 30 ft. of allied creatures, grants +2 to initiative rolls when it detects incoming threats
• Natural Seismograph: Detects movement of medium or larger creatures within 60 ft., even through foliage or brush

• Diet: Fungal spores, decaying plant matter, and small insects
• Social Structure: Mostly solitary; loosely gregarious during the moist-season bloom
• Activity Pattern: Diurnal, most active during periods of wind stillness or pre-storm humidity

• False Threat Display: Rhythmic body pulses simulate a larger or more dangerous creature
• Silent Retreat: Slides under bark layers or into soft underbrush when disturbed
• Scent Cloak: Emits a mild moss-like odor to blend with surrounding foliage

• Breeding Trigger: Initiated by sustained humidity and soil temperature rising above 28°C
• Egg Cluster Size: 200–300 eggs
• Nesting Sites: Moist detritus beds under layered bark
• Hatching Time: 4–6 days
• Lifespan: 3–5 years (Estimation)

Rattleback Crawlers can subtly enrich the game environment or be used as natural alarm systems:

• Living Alarm: Their vibration sense allows them to detect approaching enemies, giving perceptive players an edge
• Non-Combat Encounter: Ideal for moments of tension or immersion in nature-focused missions
• Rare Harvest Material: Vibration organs are sometimes used by Exohuman engineers to craft primitive seismic detectors or motion traps

• VOI 700 D
• Habitual Belt
• Asari Region
• Tropical Forest
• Known Wildlife of Asari

Known Predators:

• Naka Tula
• Shellmire Crab (occasionally scavenges eggs)