Temnothorax koreanus

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Native to the Palaearctic region: Korea, Japan, and central China (Hubei) ^[1][2][4][5]. Found in open situations such as seashores, parks, and shrine sites (e.g., Matsuyama Castle) ^[1][3].
• Colony Type: Unconfirmed. Most Temnothorax species are monogyne (single-queen), but specific data for this species is lacking.
• Size & Growth:
  • Queen: Unconfirmed, estimated around 4-5 mm based on typical Temnothorax queen size
  • Worker: 2-2.5 mm ^[1]
  • Colony: Likely small, under 200 workers at maturity, based on related species
  • Growth: Moderate
  • Development: Estimated 6-10 weeks at optimal temperature, based on typical Temnothorax development (Direct development data unavailable for this species.)
• Antkeeping:
  • Temperature: Keep around 20-24°C, typical for temperate Temnothorax species. Provide a slight gradient so workers can choose.
  • Humidity: Moderate humidity. Keep the nest substrate slightly moist but not waterlogged, these ants come from variable open habitats.
  • Diapause: Likely yes, this is a temperate species. Provide 2-3 months at 10-15°C during winter to mimic natural conditions.
  • Nesting: Prefers small, tight chambers typical of its tiny size. Y-tong (AAC) or plaster nests work well. In the wild they occupy small cavities in open areas ^[1].
• Behavior: Generally peaceful and non-aggressive. Workers are active foragers, moving individually or in small groups. They have a modified stinger used to smear venom (a trait common in the tribe Crematogastrini) rather than piercing, but they rarely use it defensively with keepers. Their tiny size (2-2.5 mm) means standard escape prevention (Fluon, tight lids) is essential. Based on genus patterns, they are curious and timid.
• Common Issues: tiny size makes escape prevention critical, use fine mesh or Fluon barriers, rare in the wild, wild colonies may be difficult to find or collect, slow colony growth can test beginner patience, winter diapause requirements must be met or colonies may decline over time, test tube setups need proper water reservoir management to avoid flooding or drying out

Housing and Nest Preferences

Because Temnothorax koreanus workers are only 2-2.5 mm, choose a formicarium with small chambers and narrow passages. Y-tong (AAC) nests work well because they hold moisture and offer tight spaces. Plaster nests are also a good option. In the wild they live in small cavities in open areas like parks and seashores ^[1], so they don't need deep soil. Provide a water source (test tube or plastic reservoir) connected to the nest to keep the substrate slightly moist. The outworld can be simple, they aren't strong climbers, but cover edges with Fluon and use tight lids to prevent escapes. No specific nesting data exists for this species, so these recommendations are based on related Temnothorax species.

Feeding and Diet

Like most Temnothorax, T. koreanus is likely a generalist omnivore. Offer small protein sources like flightless fruit flies, pinhead crickets, or small mealworm pieces. Sugar sources can be honey water or sugar water provided on a cotton ball. In the wild they would forage on small arthropods and honeydew. Feed protein 2-3 times per week in portions small enough to be consumed within a day. Remove uneaten prey to prevent mold. Because workers are tiny, even a small fruit fly is a big meal for them. Keep sugar water available at all times.

Temperature and Seasonal Care

Maintain a nest temperature of 20-24°C for steady brood development. This matches the temperate climate of their native East Asia. Use a heating cable on one side of the nest to create a gradient. During winter, provide a diapause period of 2-3 months at 10-15°C. Reduce feeding and keep the nest slightly cooler (but not frozen). Avoid sudden temperature changes. Exact requirements are unstudied for this species, so these guidelines follow typical temperate Temnothorax care.

Behavior and Colony Dynamics

Workers are active, curious, and non-aggressive. They forage individually or in small clusters rather than forming large raiding parties. When threatened, they can smear a venom using a modified spatulate stinger (common to the tribe Crematogastrini), this is more of a repellent than a painful sting. Workers are 2-2.5 mm, agile, and alert. Colonies are thought to be small, likely under 200 workers at peak, and the queen probably lays eggs seasonally. This species is considered rare in the wild ^[1][3], so established captive colonies are valuable. Direct behavioral studies for T. koreanus are lacking, so most observations come from related Temnothorax species.

Frequently Asked Questions

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References