Nylanderia goeldii

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to the Neotropical region, originally described from Brazil (Espirito Santo province) with a wide distribution likely spanning much of South America ^[2]. Found in Trinidad (West Indies first record) at the Arima-Blanchisseuse Road area ^[2]. In nature, they likely nest in soil, under stones, or in decaying wood in tropical forest environments ^[1].
• Colony Type: Colony structure is unconfirmed for this specific species. Based on typical Nylanderia patterns, they likely form single-queen colonies (monogyne) ^[1].
• Size & Growth:
  • Queen: ~4-6 mm, inferred from Nylanderia genus ^[1]
  • Worker: ~2-3 mm, inferred from Nylanderia genus ^[1]
  • Colony: Unknown, no species-specific data, but related Nylanderia species can have several hundred workers ^[1]
  • Growth: Moderate, based on genus patterns ^[1]
  • Development: Estimated 6-8 weeks at tropical temperatures ^[1] (Development time is estimated from genus patterns, species-specific data is unavailable.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. Provide a gentle thermal gradient. Inferred from tropical origin ^[2].
  • Humidity: Maintain moderate to high humidity. Keep the nest substrate consistently moist but not waterlogged. Inferred from tropical habitat ^[2].
  • Diapause: No, tropical species do not require hibernation ^[1].
  • Nesting: In captivity, they do well in test tubes, Y-tong nests with moist substrate. Prefer tight, humid chambers ^[1].
• Behavior: Nylanderia ants are known for their erratic, rapid movement. Workers are active foragers, typically omnivorous. They can spray formic acid when threatened but are not aggressive. Escape prevention is critical due to their small size ^[1].
• Common Issues: small size makes escape prevention critical, use fine mesh and tight-fitting lids ^[1], tropical humidity requirements can lead to mold if ventilation is poor ^[1], limited species-specific information means care is based on genus patterns ^[1], wild-caught colonies may carry parasites that can devastate captive colonies ^[1], overfeeding can lead to mold problems in the outworld ^[1]

Housing and Nest Setup

Nylanderia goeldii does well in standard ant-keeping setups. Test tubes work well for founding colonies ^[1]. Once the colony reaches 20-30 workers, you can transition to a small Y-tong nest or a naturalistic setup ^[1]. These ants prefer humid, tight chambers ^[1]. The nest material should retain moisture well, plaster, moist soil, or Y-tong with water channels all work. Place the nest in a dark area or cover it to reduce stress. An outworld for foraging should include a shallow water dish and areas for prey remains.

Feeding and Diet

Like most Nylanderia species, N. goeldii is omnivorous. Offer a constant sugar source, honey water, sugar water, or honeydew is readily accepted ^[1]. For protein, provide small insects like fruit flies, pinhead crickets, or mealworm pieces ^[1]. They are small ants, so prey should be appropriately sized. Feed protein 2-3 times per week, removing any uneaten prey after 24 hours to prevent mold ^[1].

Temperature and Humidity

As a tropical species from Brazil, N. goeldii needs warm conditions. Keep the nest area at 24-28°C, room temperature in most homes may suffice, but a heating cable on one side of the nest can help maintain optimal temperatures ^[2]. Use a thermostat to prevent overheating. Humidity should be moderate to high. The nest substrate should feel damp to the touch ^[2]. A water dish in the outworld provides drinking water and helps maintain ambient humidity.

Colony Development

A founding queen will seal herself in a small chamber (claustral founding, based on genus patterns) and lay her first eggs within 1-2 weeks ^[1]. She will not leave to forage, she lives entirely on stored fat reserves until the first workers emerge. The first workers (nanitics) are typically smaller than mature workers. After the nanitics emerge, the queen resumes egg-laying and the colony grows steadily. Expect 6-8 weeks from egg to first worker at optimal temperatures, though this is estimated from genus data ^[1]. Growth rate is moderate, colonies may reach 50-100 workers within the first year with good care.

Behavior and Temperament

Nylanderia ants are famous for their rapid, erratic movement, they don't walk in straight lines like many ants ^[1]. Workers are active foragers, exploring the outworld constantly. When threatened, they can spray formic acid as a defense, though this is not dangerous to humans ^[1]. They are not aggressive and rarely bite. The small worker size means they can squeeze through very small gaps, excellent escape prevention is essential ^[1]. Use fluon on test tube rims, fine mesh on outworld covers, and check for any gaps regularly.

Frequently Asked Questions

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References