Nylanderia brasiliensis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Brazil ^[1]
• Colony Type: Single-queen or multiple-queen structure is unconfirmed. Based on typical Nylanderia patterns, they likely form polygynous colonies (multiple queens sharing a nest). Polygyny means several queens can coexist and lay eggs together.
• Size & Growth:
  • Queen: size data unavailable, inferred from Nylanderia genus (~4-5 mm)
  • Worker: ~2-3 mm
  • Colony: Up to several hundred workers
  • Growth: Moderate
  • Development: Estimated 5-8 weeks (Development speed depends on consistent warmth and food availability.)
• Antkeeping:
  • Temperature: Keep warm and stable, roughly low-to-mid 20s°C. Tropical species thrive in consistent warmth.
  • Humidity: Keep the nest substrate consistently moist but not waterlogged. Provide a humidity gradient so workers can choose their preferred moisture level.
  • Diapause: No. Tropical species from Brazil do not require hibernation ^[1].
  • Nesting: Start with a test tube setup for the queen. Once the colony reaches a few dozen workers, move them to a Y-tong (AAC) or plaster nest. They prefer tight chambers that retain moisture well.
• Behavior: Active and fast-moving. They change direction frequently while foraging and explore widely for food. They are not aggressive toward humans and lack a functional sting. Escape risk is high due to their tiny size.
• Common Issues: escape through tiny gaps is common, use fine mesh and seal all nest entry points, temperature drops below 20°C cause workers to become sluggish and stop developing brood, low humidity dries out the nest and kills the queen or first workers, wild-caught colonies often carry parasites that cause sudden colony collapse

Nest Setup and Housing

Start the queen in a simple test tube. Fill the tube one-third with water, plug the opening with cotton, and wrap the front half in dark paper to reduce stress. Place the tube in a warm, humid spot. The queen will stay inside and lay eggs until the first workers emerge. Once you have a few dozen workers, transfer them to a Y-tong (AAC) or plaster nest. These ants prefer tight chambers that hold moisture. Avoid large, open nests that dry out quickly. Always check for escape gaps. Their tiny size means they can slip through cracks that larger ants cannot.

Feeding and Diet

Nylanderia brasiliensis eats almost anything you offer. Provide a steady source of sugar water or diluted honey for carbohydrates. For protein, give small insects like fruit flies, pinhead crickets, or chopped mealworms. They are active foragers and will quickly find food. Offer protein two to three times a week. Keep sugar water available at all times. Remove uneaten insects after a day to prevent mold. They are not picky and will accept most small arthropods.

Temperature and Seasonal Care

As a tropical species from Brazil, Nylanderia brasiliensis needs warm conditions year-round ^[1]. Keep the nest area in the low-to-mid 20s°C. A heating cable placed on top of the nest creates a gentle warmth gradient. Room temperature works if your home stays consistently warm. They do not need a cooling period or hibernation. Watch for stress signs. Workers that cluster together and move slowly likely need more heat. Workers that avoid the heat source and hide at the edges likely need cooler spots. Keep temperatures stable and avoid drafts.

Colony Development

The queen starts laying eggs shortly after you catch her. She feeds on stored fat while caring for the first brood. The first workers, often called nanitics, are smaller than normal workers and emerge after several weeks. Once these workers start foraging, the colony enters a steady growth phase. The queen increases her egg production, and the worker population expands. Growth speed depends on temperature and feeding. Warmer conditions and regular protein feeding speed up development. Expect steady population growth over several months.

Behavior and Temperament

These ants display the classic crazy ant movement pattern. They run quickly and change direction frequently while searching for food. They are not aggressive toward humans and rarely attempt to sting. Their small size helps them explore tight spaces and find scattered food sources. Workers form clear trails once they locate a food source. The colony builds multiple chambers for brood rearing and food storage. They generally stay peaceful with other colonies of the same species in their native range.

Frequently Asked Questions

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References