Stenamma felixi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Wet forests from lowland rainforest to cloud forest, ranging from Mexico's Atlantic slope through Central America to Ecuador, at elevations of 50-1600 m (most common above 500 m) ^[2][1]
• Colony Type: Monogyne, single queen colonies confirmed in the wild ^[2]. Founding type is unconfirmed, inferred claustral based on typical Stenamma patterns.
• Size & Growth:
  • Queen: size data unavailable (described as medium to large for the genus) ^[1]
  • Worker: size data unavailable (described as medium to large for the genus) ^[1]
  • Colony: Large nests, estimated several hundred workers, based on field descriptions ^[2]
  • Growth: Moderate (inferred from genus patterns)
  • Development: Unknown, no species-specific data available (Based on typical tropical ant development, larval period likely lasts several weeks at warm temperatures.)
• Antkeeping:
  • Temperature: Keep at 22-26 °C, they inhabit warm, humid tropical forests. Based on their elevation range (50-1600 m), they can likely tolerate 20-28 °C, but aim for mid-20s for optimal brood development ^[2][1].
  • Humidity: High humidity required, these are wet forest ants. Keep the nest substrate consistently moist but not waterlogged. Provide a moisture gradient so ants can choose their preferred level. Think damp forest floor conditions.
  • Diapause: Unlikely, as a tropical species from low to mid elevations, they do not need a true winter diapause. A slight temperature drop during winter may slow activity, but no forced cooling is required.
  • Nesting: In captivity, they do well in naturalistic setups with rotting wood pieces, or in Y-tong/plaster nests with high humidity. They naturally nest in rotting logs and tree stumps, so providing wood or cork in the setup mimics their natural preferences ^[2]. Chambers should be sized for their medium-large body.
• Behavior: Workers are epigeic, solitary foragers, they hunt alone rather than in groups ^[2]. They are not particularly aggressive and will typically flee rather than fight. They have relatively large eyes and are active foragers. Escape risk is moderate, they are not tiny but can fit through small gaps. Use standard escape prevention. They are cryptic and may spend considerable time hidden inside the nest structure.
• Common Issues: high humidity maintenance is critical, these are wet forest specialists, dry conditions or mold from stale water can kill colonies, slow founding phase, like many Stenamma, queens may take months to produce first workers, patience is key, escape prevention needed despite medium size, they can squeeze through small gaps in setups, wild-caught colonies may have parasites or diseases from their natural habitat, quarantine new colonies, overheating or prolonged exposure to temperatures above 30 °C can be fatal

Housing and Nest Setup

Stenamma felixi does well in naturalistic setups that mimic their rotting wood habitat. Offer pieces of rotting wood, cork, or a Y-tong/plaster nest with high humidity chambers. The key is maintaining consistently damp conditions without flooding. Use a water reservoir or moisture gradient so ants can self-regulate. Since they nest in rotting logs in the wild ^[2], adding small wood pieces or bark helps them feel at home. A test tube setup can work for founding colonies if kept humid, but transfer to a more spacious nest once the colony grows beyond about 20-30 workers. Avoid acrylic nests, they don't hold humidity well for this species.

Feeding and Diet

In the wild, S. felixi workers are epigeic solitary foragers, but their exact dietary preferences are unknown ^[2]. As a Myrmicinae ant, they are likely omnivorous. Offer a varied diet: small live insects (fruit flies, small crickets, mealworms) for protein, and sugar water or honey for carbohydrates. Since they forage alone, place food in the outworld rather than expecting them to find hidden food. Feed protein 2-3 times per week and keep a constant sugar source available. Remove uneaten prey after 24-48 hours to prevent mold. Start with small prey items and adjust based on what workers accept.

Temperature and Seasonal Care

Keep your colony at 22-26 °C with a slight temperature gradient so workers can choose. These ants come from tropical wet forests, so they prefer warmth and humidity. A heating cable on one side of the nest can create the needed gradient, place it above the nest (not underneath) to avoid drying out the substrate. Based on their elevation range (50-1600 m), they likely tolerate temperatures down to about 20 °C, but growth and activity slow in cooler conditions. No true diapause is needed, but you may notice reduced activity during winter if room temperature drops. Avoid temperatures below 18 °C or above 30 °C ^[2][1].

Colony Development and Growth

S. felixi colonies start with a claustral queen (inferred from genus patterns) who seals herself in and raises the first brood alone. The founding phase can take several months, be patient. First workers (nanitics) will be smaller than mature workers. Colonies in the wild become quite large, with nests described as 'generally quite large' ^[2]. Expect a moderate growth rate through the first year, with acceleration once the colony reaches 50+ workers. Since all wild colonies are monogynous ^[2], do not attempt to keep multiple queens. The colony will likely reach several hundred workers over 2-3 years under good conditions. Mating flights occur in the wild but the specific timing is unknown, in captivity, alates may appear after the colony is well-established.

Behavior and Observation

These ants are relatively calm and not aggressive. Workers are solitary foragers, they hunt alone rather than forming raiding parties or recruiting en masse ^[2]. This makes them less exciting to watch during feeding compared to species that use tandem running or chemical recruitment, but their large size and distinctive appearance make them interesting. They have relatively large eyes for a Stenamma, which may indicate better vision. You may see workers actively patrolling the outworld, especially at night or in dim light. They are cryptic and may spend considerable time in the nest, so don't worry if you don't see constant activity. Provide a dark cover for the nest to reduce stress from constant light exposure.

Frequently Asked Questions

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References