Myrmecia aberrans

Myrmecia aberrans - "Wide-jawed Bull Ant"

Myrmecia aberrans is a large, aggressive ant species native to Australia. Workers are robust ants measuring 12-20mm, with the characteristic powerful mandibles typical of bulldog ants ^[1]. The species belongs to a monophyletic group within the pilosula group, with four related species ^[2]. These ants are known for their painful sting and alert, defensive behavior. As with other Myrmecia species, they are daytime foragers with excellent vision, actively hunting prey across their territory.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Australia, found across various habitats in the Australian mainland. They nest in soil, often under stones or in decaying wood.
• Colony Type: Single-queen colonies (monogyne) based on typical Myrmecia patterns. Colony size reaches several hundred workers.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: 18-22mm (estimated based on genus patterns)
  • Worker: 12-20mm ^[1]
  • Colony: Several hundred workers (estimated based on genus patterns)
  • Growth: Moderate
  • Development: 2-3 months (estimated based on related Myrmecia species) (Development time is temperature-dependent. Myrmecia typically produce nanitic (first) workers that are smaller than normal workers.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. Provide a temperature gradient so ants can choose their preferred zone. Room temperature (20-24°C) may be acceptable if the colony is active.
  • Humidity: Moderate humidity around 50-60%. Keep the nest substrate slightly moist but allow some drying areas. These ants are more tolerant of drier conditions than many Australian species.
  • Diapause: Yes, Myrmecia species require a winter rest period. Reduce temperature to 10-15°C for 2-3 months during winter.
  • Nesting: Y-tong (acrylic) nests or naturalistic setups with soil and decorative elements work well. Provide a outworld for foraging. They prefer dark, secure nesting areas.
• Behavior: Highly defensive and aggressive. Workers are active foragers that hunt prey during daylight hours. They have excellent vision and will investigate disturbances. Escape risk is moderate, their large size makes them visible but they can climb smooth surfaces. Their sting is painful and can cause allergic reactions in sensitive individuals.
• Common Issues: sting risk is significant, handle with extreme caution, wear protective gear, colonies can be aggressive and may attack keepers during maintenance, winter diapause is essential, colonies that don't hibernate may decline, large size requires spacious formicarium setups as colonies grow, queens are claustral but founding colonies can be fragile, avoid disturbance

Housing and Nest Setup

Myrmecia aberrans requires spacious housing due to their large size and active foraging behavior. A Y-tong (acrylic) nest works well for founding colonies, providing darkness and security that these ants prefer. As colonies grow, consider transitioning to a naturalistic setup with a soil chamber and connected outworld. The nest should have chambers large enough for the colony to move freely. Provide a water test tube as a humidity source, but avoid overly damp conditions. The outworld should be spacious enough for workers to hunt and explore.

Feeding and Diet

Myrmecia aberrans is a predatory species that actively hunts insects and other arthropods. Feed workers small insects like crickets, mealworms, and fruit flies. They will also accept sugar water or honey as an energy source. Feed protein-rich prey 2-3 times per week, and keep a sugar source available at all times. Remove uneaten prey after 24-48 hours to prevent mold. Workers are daytime foragers, place food in the outworld during daylight hours for best acceptance.

Temperature and Seasonal Care

Maintain temperatures between 24-28°C during the active season. Myrmecia species benefit from a temperature gradient, allowing workers to regulate their body temperature by moving between warmer and cooler areas. During winter (roughly May to August in the Southern Hemisphere), gradually reduce temperature to 10-15°C to induce diapause. This winter rest period is essential for colony health and longevity. Resume normal temperatures gradually in spring. Avoid sudden temperature changes as this stresses the colony.

Handling and Safety

Myrmecia aberrans has a potent sting that causes significant pain and can trigger allergic reactions in sensitive individuals. This species should only be kept by experienced antkeepers who understand bulldog ant behavior. Never open the nest without proper protection, use gloves and eye protection. Work quickly but calmly during maintenance to minimize disturbance. If stung, wash the area immediately and monitor for allergic symptoms. These ants are not suitable for keepers who want a hands-off approach or have sting allergies.

Frequently Asked Questions

References