Strumigenys levana

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Madagascar, known from litter samples in forest habitats (leaf mold, rotten wood) in the Malagasy region ^[1][2]. The habitat is humid (moisture-loving) and likely receives some light, typical of forest floor microhabitats ^[2].
• Colony Type: Colony structure is unconfirmed. Based on genus patterns, likely single-queen colonies with small worker populations.
• Size & Growth:
  • Queen: Undescribed, queen has not been collected or described in the literature.
  • Worker: 1.6-1.7mm ^[1]
  • Colony: Likely under 100 workers (inferred from typical Strumigenys colony sizes)
  • Growth: Slow
  • Development: Estimated 6-10 weeks at optimal temperature (based on related Strumigenys species, exact data unavailable) (Development time is unconfirmed for this species. Expect slow growth typical of very small ant species.)
• Antkeeping:
  • Temperature: Keep around 22-26°C. They come from warm humid forests, avoid temperatures below 20°C. ^[2] indicates a preference for warm conditions.
  • Humidity: High humidity is essential. They naturally live in humid leaf litter ^[1][2]. Keep substrate consistently moist but not waterlogged, think damp leaf litter environment.
  • Diapause: Unknown. Madagascar has a mild climate, they likely do not require true hibernation but may have reduced activity periods.
  • Nesting: Very small nest requirements. Naturally nest in leaf litter and rotting wood ^[1]. A small test tube setup or a tiny plaster/Ytong nest with fine chambers works best. Escape prevention must be extreme.
• Behavior: Predatory ants that hunt small invertebrates in the leaf litter. They are not aggressive toward humans, they possess a functional stinger (subfamily Myrmicinae, tribe Attini) but due to their tiny size it is not medically significant. Escape prevention is absolutely critical, their minute size allows them to squeeze through standard barriers. They are relatively slow-moving but capture prey with their specialized mandibles.
• Common Issues: escape prevention is critical, extremely tiny (1.6mm) and can squeeze through standard barrier materials, slow growth and small colony sizes make colonies fragile and slow to develop, requires live prey, they are obligate predators and will not accept sugar or dead food easily, high humidity needs make mold a constant risk if ventilation is poor, wild-caught colonies may have parasites that can devastate small populations

Housing and Nest Setup

Strumigenys levana requires careful housing due to their extremely small size. Workers measure only 1.6-1.7mm, making them one of the smallest ant species you can keep ^[1]. Use a small test tube setup or a tiny plaster/Ytong nest with chambers scaled to their size. The nest material should be kept consistently moist, these ants naturally live in damp leaf litter and rotting wood ^[1][2]. Escape prevention must be excellent. Standard cotton barriers and standard mesh will not contain them. Use fluon on all lid edges and fine mesh (0.5mm or smaller) for any ventilation openings. Even tiny gaps around lid edges can allow escapes.

Feeding and Diet

Strumigenys levana is predatory and requires live small prey. In the wild, they hunt micro-organisms in forest leaf litter. In captivity, offer small live prey such as springtails, tiny isopods, or fruit fly larvae. They will not accept sugar water or honey, they are obligate predators. Feed small prey items every few days, removing any uneaten prey to prevent mold. The key to keeping this species alive is a constant supply of small live prey. Do not attempt to keep them on a diet of dead insects or protein paste, they will not accept it.

Temperature and Humidity

Keep these ants warm and humid. Aim for temperatures in the 22-26°C range, they come from Madagascar's humid forest environments where temperatures are warm year-round ^[2]. Humidity is critical: maintain substrate that is damp but not waterlogged. A moisture gradient works well, with one side of the nest kept moister than the other so ants can choose their preferred conditions. Avoid letting the nest dry out completely. Room temperature in most homes (20-24°C) should be acceptable, but monitor colony activity, if workers seem sluggish, slightly increase temperature.

Behavior and Temperament

These ants are completely harmless to humans. They are tiny, non-aggressive, and possess a functional stinger (subfamily Myrmicinae, tribe Attini) but it is not medically significant. Their main defense is escaping, they are fast runners for their size and will rapidly disperse if given the chance. They are not colony aggressive and do not have alarm pheromones that cause mass attacks. In the nest, they are relatively calm. However, their tiny size makes them vulnerable, a single fall or escape can mean losing your entire colony. They are slow to establish and slow to grow, so patience is essential. Do not disturb the nest frequently.

Colony Establishment

Establishing a colony of Strumigenys levana requires patience. If you acquire a founding queen, she will likely lay few eggs at a time. The first workers (nanitics) will be tiny and the colony will grow slowly. Expect the first workers to appear 6-10 weeks after eggs are laid, based on related Strumigenys species. Do not overfeed founding colonies, excess prey can mold and kill the queen or brood. Keep the setup dark and undisturbed during the founding stage. Once workers emerge, you can slowly increase feeding. Colonies likely remain small (under 100 workers) even at maturity.

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