Leptogenys processionalis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to the Indomalayan region: India, Sri Lanka, Vietnam, and Borneo. Found in multiple Indian states, inhabiting ground-level in dry deciduous and evergreen forests, less disturbed areas, and peri-urban habitats ^[1][5][8][9].
• Colony Type: Unconfirmed, no specific data on queen number from research.
• Size & Growth:
  • Queen: Size data unavailable, no total length measurements documented for queens.
  • Worker: 8-9 mm ^[1][2][3]
  • Colony: Unknown, not documented in research.
  • Growth: Unknown, no data on development timeline.
  • Development: Unknown, no direct measurements available. (Development timeline has not been studied for this species.)
• Antkeeping:
  • Temperature: Maintain 24-28°C based on tropical distribution ^[10][1].
  • Humidity: Keep nest substrate consistently moist but not waterlogged, with some drier areas available ^[8][10].
  • Diapause: Unknown, no documented diapause requirement.
  • Nesting: Ground-dwelling species that nests in loose soil, under objects, and in tree trunk hollows. Provide a naturalistic setup with soil or a Y-tong/plaster nest with moist substrate ^[8][1].
• Behavior: L. processionalis is an aggressive predator with a painful sting. Workers forage cooperatively in raiding columns, following pheromone trails in single file. They form bidirectional traffic on trails with distinctive platoon formations. Scouts locate prey and recruit nestmates through tandem running or direct recruitment. They specialize in hunting centipedes and other arthropods, using coordinated attacks and cooperative transport. Escape prevention is important, use standard barriers as they are moderate-sized ants ^[6][7][1][8].
• Common Issues: nomadic nature means colonies may try to relocate frequently, provide spacious outworld and secure boundaries., specialized predator requiring live prey, may not accept commercial ant foods alone., painful sting means handling requires caution, workers will sting if threatened., colonies may be sensitive to disturbance due to their nomadic/raiding lifestyle., limited availability of captive-reared colonies means most keepers source wild-caught colonies which may have parasites.

Housing and Nest Setup

L. processionalis is a ground-dwelling ant that prefers enclosed nest spaces with moist substrate. In captivity, a Y-tong nest or plaster nest works well, filled with moist soil or sand. Provide chambers scaled to their 8-9mm worker size. Since they are nomadic and often relocate their nests in the wild, they may benefit from a spacious formicarium with multiple connected chambers. The outworld should be large enough for raiding columns and cooperative prey transport. Use a water test tube as a humidity reservoir. Secure all connections and edges as these ants are agile and will exploit any gaps ^[8][1].

Feeding and Diet

As a specialized predator, L. processionalis requires live prey in captivity. Their primary natural prey includes centipedes, termites, cockroaches, and other arthropods. In captivity, offer live small insects like crickets, mealworms, roaches, and especially centipedes or other multi-legged prey. They will scavenge on larger dead prey like rat carcasses when available in the wild ^[6][1]. Feed protein-rich prey 2-3 times per week, removing uneaten prey after 24 hours. Sugar sources are not a primary part of their diet, they obtain nutrients from their prey. Some keepers report success with occasional honey or sugar water, but live prey should form the bulk of their diet ^[6][1][8].

Temperature and Seasonal Care

Maintain temperatures between 24-28°C, reflecting their tropical origin across India, Sri Lanka, Vietnam, and Borneo. A heating cable on one side of the nest creates a gentle gradient allowing workers to self-regulate. Place heating on top of the nest to avoid drying out the substrate too quickly. They occur in both wet and dry zones of Sri Lanka, suggesting tolerance to varying conditions, but avoid temperature extremes. During cooler months, activity may naturally decrease, no true diapause is required, but reduce feeding frequency if colony activity slows ^[10][1].

Foraging Behavior and Trail Dynamics

Workers form distinctive raiding columns where they follow one another in single-file queues. Research shows they form 'platoons', groups of several workers separated by roughly three body-lengths that move together. Traffic is bidirectional with a dominant direction. Average velocity is about 4-6 body lengths per second. When encountering prey, scouts assess it first, then recruit nestmates who coordinate attacks, encircling the prey and using their powerful mandibles and sting to paralyze it. After capture, workers form chains to cooperatively transport prey back to the nest ^[7][6].

Defense and Sting

L. processionalis possesses a painful, exserted sting that they will use defensively. Workers are not aggressive toward humans unless the nest is disturbed, but they will sting if threatened or handled roughly. The sting is described as very severe in the original species description. When working with this species, use caution and avoid disturbing the nest unnecessarily. Provide deep substrate or a retreat area so workers feel secure and are less likely to sting defensively ^[1][11].

Cooperative Hunting

This species demonstrates cooperative hunting strategies. Observations in the wild show scouts initially approaching prey (including centipedes) and touching the prey's cuticle with their antennae without immediately attacking. After 1-2 minutes, workers encircle the prey from every direction and use their powerful curved mandibles and sting to capture and paralyze it. After paralyzing prey, they form small chains to pull the prey toward the nest. This chain-forming behavior regularly breaks and rebuilds, especially when encountering obstacles. This cooperative behavior makes them a fascinating species to observe, but requires keepers to provide appropriately sized live prey ^[6].

Frequently Asked Questions

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References