Temnothorax bimbache

Quick Summary

• Difficulty: Medium
• Origin & Habitat: El Hierro in the Canary Islands. They nest under small volcanic stones in shallow soil and rock voids, typically in protected spots with vegetation on northern-facing slopes ^[1].
• Colony Type: Likely monogyne (single queen) based on typical Temnothorax patterns. Founding behavior is unconfirmed but probably claustral.
• Size & Growth:
  • Queen: 4.9-5.5mm ^[1]
  • Worker: 3.4-4.1mm ^[1]
  • Colony: Unknown. Based on typical Temnothorax patterns, colonies may reach up to 500 workers.
  • Growth: Moderate, typical for small Myrmicinae ants
  • Development: Estimated 6-10 weeks based on typical Temnothorax development at room temperature (Development time is an estimate since specific timing has not been documented for this species)
• Antkeeping:
  • Temperature: Room temperature (20-24°C) suits them, based on their subtropical origin. A slight gradient is beneficial.
  • Humidity: Moderate. Keep the nest substrate lightly moist but not waterlogged, with a dry area available. In nature they nest under stones in volcanic rock, so they tolerate some dryness but need access to moisture.
  • Diapause: Probably not required. Being from a subtropical island, they likely remain active year-round with a slight slowdown in cooler months. Not studied.
  • Nesting: Y-tong (AAC), plaster tests, or test tube setups work well. Provide tight, small chambers scaled to their tiny size. Add a small flat stone to mimic their natural volcanic stone habitat.
• Behavior: Peaceful and non-aggressive. Workers forage actively but do not bite strongly. Escape prevention is critical due to their small size (under 4mm). They are not known to sting.
• Common Issues: small size means escapes are likely without fine mesh barriers, limited distribution makes wild collection difficult and potentially harmful to populations, recently described species with limited captive care information, slow colony growth can frustrate beginners, queen mortality during founding is common if disturbed

Housing and Nest Setup

Temnothorax bimbache does well in Y-tong (AAC) nests, which provide the tight chambers and smooth surfaces these small ants prefer. Test tube setups also work well, especially for founding colonies. Provide chambers scaled to their tiny 3-4mm worker size, avoid large, open spaces. In nature, they nest under volcanic stones and in rock voids, so adding a small flat stone or piece of porous material to the outworld helps them feel at home. Keep the nest area dark or dimly lit, as they prefer sheltered locations ^[1].

Feeding and Diet

Like other Temnothorax species, these ants are omnivorous. Offer small insects like fruit flies, pinhead crickets, and other tiny prey for protein. Sugar sources are also important, diluted honey, sugar water, or ant-friendly sugar gels work well. They likely collect honeydew in the wild, so both protein and sugar matter. Feed small amounts a few times per week and remove any uneaten prey after 24 hours to prevent mold. A constant sugar source is recommended for established colonies.

Temperature and Seasonal Care

Being from El Hierro in the Canary Islands (subtropical), these ants prefer warmer conditions than many European Temnothorax species. Keep them at 20-24°C for optimal activity and brood development. Room temperature is usually suitable. Winged queens emerged in the lab during April and May, suggesting they are active in warm months ^[1]. They likely do not need a true diapause, but you can reduce temperatures slightly in winter (to around 15-18°C) to simulate slower seasonal activity. Avoid temperatures below 15°C or above 28°C. A heating cable on one side of the nest creates a beneficial gradient.

Colony Founding

Founding behavior has not been directly observed for Temnothorax bimbache. Based on typical Temnothorax patterns, it is likely claustral, the queen seals herself in a small chamber and raises the first workers on stored fat reserves. She does not leave to forage during this time. Queens measure 4.9-5.5mm, with substantial body reserves ^[1]. The first workers should emerge in an estimated 6-10 weeks depending on temperature. During founding, keep the queen undisturbed in a dark, stable environment.

Behavior and Temperament

Temnothorax bimbache is a peaceful species. Workers are active and will forage in the outworld for food. They are not aggressive and rarely bite. Their small size (workers only 3.4-4.1mm) means they can escape through tiny gaps, use fine mesh on ventilation holes and ensure tight lid seals. As a member of the Crematogastrini tribe, they may possess a modified stinger for smearing venom, but they are not aggressive toward humans. Colonies are likely single-queen (monogyne) based on genus patterns. ^[1]

Frequently Asked Questions

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References