Strumigenys doydeei

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Southeast Asia, recorded in Vietnam (Đắk Nông), Thailand (Chaiyaphum), and southern China (Yunnan). Lives in rubber plantations at elevations from 895 to 912 m ^[1]. Tropical to subtropical region with warm temperatures and seasonal rainfall.
• Colony Type: Colony structure is unconfirmed. Based on related Strumigenys species, they likely form small colonies with a single queen. Most Strumigenys produce fewer than 100 workers.
• Size & Growth:
  • Queen: ~3.1 mm ^[1]
  • Worker: ~2.4-2.7 mm ^[1]
  • Colony: Likely under 100 workers (inferred from typical Strumigenys colony sizes)
  • Growth: Slow
  • Development: Estimated 8-12 weeks (based on related Strumigenys, not confirmed for this species) (Development times haven't been directly studied. Strumigenys are known for slow colony growth compared to other Myrmicinae.)
• Antkeeping:
  • Temperature: Keep around 24-28 °C. Use a gentle heating gradient so workers can choose their preferred temperature. This estimate is based on their tropical habitat.
  • Humidity: High humidity is essential, aim for 70-85% relative humidity or keep the nest substrate consistently damp but not waterlogged. This is inferred from their humid plantation environment.
  • Diapause: Unlikely to require true diapause (tropical species). A slight winter temperature reduction may be beneficial, but avoid cold below 20 °C.
  • Nesting: Natural nesting sites are unknown. Strumigenys typically nest in soil or rotting wood in humid environments. In captivity, use a naturalistic setup with moist soil or a well-humidified plaster/Y‑tong nest with small chambers scaled to their tiny size.
• Behavior: Strumigenys doydeei is a specialized predator that hunts micro‑arthropods. They have a functional sting (subfamily Myrmicinae, tribe Attini, sting present, not medically significant to humans). They are extremely small (under 3 mm), so escape prevention is critical. Colonies are likely peaceful and non‑aggressive. Their tiny size means they can squeeze through very small gaps, use fine mesh (≤0.5 mm) on all openings.
• Common Issues: escape prevention is critical due to their tiny size, use fine mesh and tight seals, slow colony growth can frustrate keepers expecting quick buildup, specialized diet, they need live micro‑prey and cannot survive on sugars alone, high humidity requirements can lead to mold if ventilation is poor, wild‑caught colonies may carry parasites or pathogens that can devastate a captive colony

Housing and Setup

Because Strumigenys doydeei is so tiny (workers ~2.4-2.7 mm, queen ~3.1 mm), the nest must be designed to prevent escapes. Use a naturalistic setup with moist soil or a well‑humidified plaster/Y‑tong nest with very small chambers. A test tube setup works for founding, but for longer term a proper nest with fine mesh barriers (≤0.5 mm) on all openings is essential. They can squeeze through gaps that look impossible. Provide a water reservoir or hydration tube to keep the substrate consistently damp without flooding. Keep the outworld also sealed, fluon or PTFE barriers alone will not stop these ants because they are too small to be affected by the coating. ^[1]

Feeding and Diet

Strumigenys doydeei is a specialized predator that requires live micro‑prey. In the wild, related Strumigenys hunt springtails, tiny isopods, and other small arthropods using their trap‑jaw mandibles (the dentition includes 16-17 teeth) ^[1]. In captivity, the primary food should be live springtails, they are the right size and nutritionally complete. Small isopods, booklice (psocids), and fruit flies can also be offered. Sugar water or honey is unlikely to be accepted, as Strumigenys are not known as honeydew feeders. Provide small amounts of prey every 2-3 days and remove any leftovers to prevent mold. Because of their tiny size, they cannot overpower larger prey. ^[1]

Temperature and Humidity

As a tropical species from Southeast Asia, Strumigenys doydeei requires warm and humid conditions. Keep the nest area at 24-28 °C (inferred from their plantation habitat). A gentle heat mat on one side gives workers a temperature gradient. Room temperature in most homes may be too cool for optimal brood development. Humidity should be high, aim for 70-85% or keep the substrate consistently moist but not waterlogged. Condensation on the nest walls is a good indicator. Poor humidity leads to desiccation and colony death. Balance humidity with ventilation to avoid mold. ^[1]

Colony Development

Colony growth will be slow, this is characteristic of the genus. The queen (3.1 mm) is slightly larger than workers ^[1]. After founding, the first workers (nanitics) typically appear after an estimated 8-12 weeks at optimal temperature (based on related species). Colonies likely remain small, potentially under 100 workers even at maturity. This slow growth is partly due to their solitary hunting style, they do not organize large raids. Patience is essential. A well‑established colony may take years to reach its maximum size. ^[1]

Behavior and Temperament

Strumigenys doydeei is a peaceful species. Like the rest of the Myrmicinae tribe Attini, they possess a functional sting, but it is not medically significant to humans and they are rarely aggressive toward keepers. Their behavior centers on hunting, workers use their unique trap‑jaw mandibles to capture tiny prey. Colonies are not aggressive and can be kept in single-queen setups (multi‑queen not documented). The biggest concern is escape: they are tiny, active hunters that will explore vigorously. Always use excellent barriers (fine mesh, tight seals) when the colony is open for feeding or maintenance. ^[1]

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