Tetramorium lucyae

Quick Summary

• Difficulty: Hard
• Origin & Habitat: Upper montane forest of Borneo (Gunung Murud, Sarawak, Malaysia) at approximately 2076 m elevation. Nests in the ground ^[1].
• Colony Type: Polygynous – multiple queens live together in a single colony, as seen in the type nest (2 gynes with 203 workers) ^[1].
• Size & Growth:
  • Queen: ~4.3 mm (total length) ^[1]
  • Worker: 3.6–3.8 mm (mean 3.73 mm) ^[1]
  • Colony: At least 203 workers in the wild, likely larger established colonies exist ^[1]
  • Growth: Moderate – estimated based on typical Tetramorium patterns
  • Development: 6–10 weeks at optimal temperature (estimated, not directly studied) ^[1] (No species-specific data. The estimate comes from related Tetramorium species kept under stable conditions.)
• Antkeeping:
  • Temperature: Keep at 20–24°C, with 20–22°C ideal. The high-altitude origin means they prefer cooler conditions than most tropical ants. Avoid temperatures above 28°C ^[1].
  • Humidity: High humidity required – think damp mountain forest floor. Keep the nest substrate consistently moist but not waterlogged, and provide a moisture gradient so ants can choose their preferred microclimate ^[1].
  • Diapause: Unlikely. Being a tropical mountain species from near the equator, they do not need a winter dormancy. Some seasonal slowdown may occur naturally ^[1].
  • Nesting: Ground-nesting. Use a naturalistic setup with moist soil, a Y‑tong/plaster nest, or a 3D‑printed nest that retains moisture. Provide a humidity gradient and avoid air‑conditioned spots ^[1].
• Behavior: Calm and not particularly aggressive. Workers are medium‑sized (3.6–4.3 mm) and can sting, but the sting is mild (typical of Tetramorium). They forage on the ground and likely collect honeydew and small prey. The extremely long hairs may have a sensory or defensive function. Colonies are polygynous, so queens coexist peacefully ^[1].
• Common Issues: very rare in captivity – almost no captive breeding records, so you may have to work with a wild‑caught colony ^[1], high humidity needs can cause mold if ventilation is poor – balance moisture with airflow, cold sensitivity – avoid temperatures below 18°C, and do not place near air conditioning vents ^[1], no established feeding protocol – start with standard Tetramorium fare (sugar water, small insects) and observe preferences, wild‑caught colonies may carry parasites or diseases from their native habitat – quarantine new colonies

Housing and Nest Setup

Tetramorium lucyae is a ground‑nester from cool, humid mountain forests. In captivity, use a nest that holds moisture well: a soil setup, Y‑tong (AAC) block, or plaster nest. Create a humidity gradient – keep one part of the nest quite damp and another part slightly drier so the ants can self‑regulate ^[1]. A test tube works for a founding colony, but upgrade to a larger formicarium once the colony grows beyond 30–50 workers. Place the nest in a spot that stays around 20–22°C, away from air conditioning or direct sunlight. Provide good ventilation to prevent mold without drying out the nest. A shallow water dish in the outworld is useful ^[1].

Feeding and Diet

In the wild, Tetramorium species forage for honeydew, small insects, and other protein sources. Offer your colony a varied diet: sugar water or honey for energy, and protein from small crickets, mealworms, or fruit flies. Since captive data for this species is almost nonexistent, start with standard Tetramorium fare and watch what they prefer. Remove uneaten prey after 24–48 hours to avoid mold. Always provide a clean water source. Being from a cooler mountain habitat, they may be less active at high temperatures, so consider offering food in the cooler part of the day ^[1].

Temperature and Seasonal Care

This species lives at about 2076 m elevation in Borneo, so it prefers cooler conditions than typical tropical ants. Keep the nest at 20–24°C, with 20–22°C being ideal. Do not let it go above 28°C or below 18°C for long periods ^[1]. Unlike temperate ants, they do not need a winter diapause. However, you may notice slightly reduced activity during the cooler months – this is natural, so just cut back on feeding and avoid disturbing them. If your home is climate‑controlled, keep the enclosure away from vents that could cause sudden temperature swings ^[1].

Colony Structure and Multi‑Queen Care

Wild colonies of Tetramorium lucyae are polygynous – the type nest contained 203 workers and 2 queens (gynes) together ^[1]. This means multiple queens can coexist peacefully in captivity. Do not try to separate them, they will work together and make the colony more resilient if one dies. Because the colony can grow large, plan ahead with a spacious formicarium. If you obtain a single queen, the colony may remain monogyne unless extra queens are introduced, but this is uncharted territory. Overall, the natural multi‑queen structure is a key advantage for keeping this species ^[1].

Handling and Temperament

These ants are calm and not aggressive. Workers are 3.6–3.8 mm long and have a functional stinger (like all Myrmicinae), but the sting is mild – comparable to a tiny pinch. They prefer to retreat than fight. The most striking feature is the incredibly long, curved whitish hairs covering the whole body – these make the species easy to identify and are a treat to observe up close ^[1]. For escape prevention, use standard barriers (fluon or PTFE) and make sure gaps are under 1 mm. While they are not notorious escape artists, their small size means any gap is a potential exit ^[1].

Frequently Asked Questions

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References