Aphaenogaster takahashii

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Taiwan and eastern China (Zhejiang, Anhui, Hubei, Sichuan), extratropical forest habitats at approximately 31°N latitude ^[2][1][3]
• Colony Type: Colony structure unconfirmed, likely monogyne based on typical Aphaenogaster patterns
• Size & Growth:
  • Queen: Size data unavailable, inferred from genus patterns to be slightly larger than workers (~7-9mm)
  • Worker: 5.0-7.0mm ^[1][3]
  • Colony: Colony size data unavailable for this species
  • Growth: Moderate
  • Development: Estimated 8-12 weeks at 25°C based on related temperate Aphaenogaster species (Development slows significantly if temperatures drop below 20°C. First workers (nanitics) may emerge slightly faster but smaller than subsequent workers.)
• Antkeeping:
  • Temperature: Keep at 20-25°C during active season, hibernation at 5-10°C for 3-4 months, temperature needs inferred from extratropical distribution at 31°N ^[2]
  • Humidity: Maintain moderate humidity, keep nest substrate damp but not waterlogged. Provide a humidity gradient with one side slightly damper than the other.
  • Diapause: Yes, required based on extratropical latitude 31°N. Provide 3-4 months of cold conditions (5-10°C) during winter ^[2].
  • Nesting: In nature, they nest under stones and in rotting wood. Y-tong, plaster, or naturalistic soil setups work well in captivity
• Behavior: Calm and non-aggressive. Workers are not known to bite or sting humans. They forage individually rather than in dense trails. Low escape risk due to moderate size (5-7mm), but can fit through small gaps if barriers fail.
• Common Issues: hibernation timing mistakes, cooling too quickly or keeping too wet during winter can kill the colony., wild-caught queens may be infertile or carry parasitic mites that spread to the brood., slow initial growth requires patience, overfeeding protein to speed up development causes mold issues., substrate drying out during the active season stresses the colony and slows brood development.

Nest Preferences

In nature, Aphaenogaster takahashii nests under flat stones and in rotting wood, typical for the genus across their Taiwanese and Chinese forest habitats ^[1]. For captive colonies, provide a nest with moderate humidity retention that won't dry out quickly. Y-tong (aerated concrete), plaster, or naturalistic setups with soil and flat stones work well. Chambers should be sized appropriately for 5-7mm ants, tunnels around 8-10mm wide allow comfortable movement without being so large that the colony feels exposed.

Maintain a moisture gradient with one side slightly damper than the other, allowing the ants to choose their preferred humidity. The substrate should feel damp to the touch but not soggy. Avoid completely dry setups, while they don't need tropical humidity, they prefer consistent moderate moisture similar to a forest floor. Provide a small outworld for foraging with a barrier like Fluon or talcum powder to prevent escapes.

Temperature and Seasonal Care

Coming from extratropical regions at 31°N latitude, these ants experience significant seasonal changes and require a winter rest period ^[2]. During the active season (spring through fall), keep them at 20-25°C. A heating cable on one side of the nest creates a beneficial gradient, but place it on top rather than underneath to avoid creating condensation problems.

As temperatures drop in nature, you will need to provide a hibernation period. Starting in late fall (October-November), gradually reduce temperatures over 2-3 weeks until they reach 5-10°C. Maintain this cool period for 3-4 months. Keep the nest slightly moist but not wet during hibernation to prevent desiccation while avoiding mold. Return to room temperature gradually in spring (February-March). Watch for brood development resuming as a sign that the colony is ready for the active season.

Feeding and Diet

Like other Aphaenogaster species, they are omnivorous scavengers that collect both plant and animal matter. Offer a mix of protein sources such as small insects, mealworms, crickets, or fruit flies 2-3 times weekly. They may also appreciate seeds, as many Aphaenogaster species are granivorous, try offering small seeds like millet or canary seed to see if they store them.

Provide carbohydrates constantly in the form of honey water or sugar water (10-20% solution). Place liquid food in a small feeder or on cotton to prevent drowning. Remove uneaten protein within 24-48 hours to prevent mold growth in the nest. During hibernation, stop feeding protein and reduce or eliminate sugar water, though you can offer a small drop if the ants remain slightly active. ^[3]

Behavior and Temperament

These are generally calm, deliberate ants. Workers are not aggressive and rarely bite, though they may be shy and hide when the colony is small or disturbed. They forage individually rather than forming dense trails, using their long antennae to explore the environment. Their long legs give them an elegant, almost stilt-like gait as they move.

At 5-7mm, they are large enough to be easily observed and handled (for cage maintenance) but small enough to fit through gaps if barriers fail, though they are not known as escape artists compared to smaller species. They do not possess a functional stinger capable of penetrating human skin. When threatened, they may play dead or retreat rather than attack. ^[1][3]

Colony Founding

Founding behavior is not directly documented for this species. Aphaenogaster queens typically found colonies claustrally, meaning the queen seals herself in a chamber and raises the first workers entirely on stored body fat without leaving to forage. Set up founding queens in standard test tubes with water reservoirs, providing a dark, undisturbed environment.

Keep founding queens at 20-25°C during the founding phase. Do not feed them during this period, the queen survives on her internal reserves. Disturb the test tube as little as possible, check only once every 1-2 weeks for water levels or mold. The first workers (nanitics) will likely emerge after 8-12 weeks based on patterns from related temperate Aphaenogaster species. Once workers arrive, offer small amounts of sugar water and tiny prey items. ^[3]

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References