Myrmecia michaelseni

Myrmecia michaelseni

Myrmecia michaelseni is a striking black bulldog ant native to Western Australia, specifically found in the Jarrah-Marri forests of the wetter south-western regions ^[1]. Workers are black with distinctive yellow to orange-yellow pubescence on the abdomen (gaster), which helps distinguish them from the similar Myrmecia rugosa species ^[1]. As a member of the pilosula species group, these ants are medium-sized bulldog ants known for their powerful mandibles and painful sting ^[2]. The species was originally described by Forel in 1907,with queens later described by Clark in 1943 ^[1]. This species is not commonly kept in captivity compared to some other Myrmecia species, making it an interesting choice for more experienced antkeepers looking for something different.

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Western Australia, specifically the Jarrah-Marri forests in the wetter south-western parts of the state ^[1]. These ants inhabit damp, forested areas with moderate rainfall.
• Colony Type: Single-queen colonies (monogyne). Like other Myrmecia species, colonies likely have one founding queen that establishes the nest alone.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Estimated 18-22mm based on typical Myrmecia pilosula group size range
  • Worker: Estimated 12-16mm based on typical Myrmecia pilosula group size range
  • Colony: Likely several hundred workers at maturity based on typical Myrmecia colony development
  • Growth: Moderate, Myrmecia species typically take several months to a year to establish first workers
  • Development: Estimated 8-12 weeks at optimal temperature based on related Myrmecia species (Development time is temperature-dependent, warmer conditions within safe ranges may speed development)
• Antkeeping:
  • Temperature: Keep nest area at 24-28°C. Myrmecia are warmth-loving ants, but avoid overheating. A heating cable on one side of the nest creates a gentle gradient allowing ants to self-regulate.
  • Humidity: Moderate humidity around 50-60%. These forest-dwelling ants prefer conditions that mimic their damp habitat but not waterlogged. Keep substrate moist but allow drying between waterings.
  • Diapause: Likely yes, Western Australian temperate origin suggests a winter rest period. Reduce temperature to 10-15°C for 2-3 months during Australian winter (June-August in Southern Hemisphere).
  • Nesting: Y-tong (AAC) nests or plaster nests work well. These ants are moderately large and can chew through softer materials. Provide a deep nesting area as they naturally dig chambers in soil or rotting wood.
• Behavior: Typical bulldog ant temperament, defensive and willing to use their potent sting when threatened. Workers are active foragers, hunting insects and scavenging. They have good vision and will investigate disturbances. Escape risk is moderate, they're large enough to be contained with standard barriers but strong enough to find weak points. Close-fitting lids and smooth barrier bands (like fluon) are essential.
• Common Issues: Sting pain, these ants have a painful sting and should be handled with caution, Colony establishment can be slow, beginners may lose patience during the claustral founding phase, Queens are solitary founders, stress or disturbance during founding often leads to colony failure, Escape prevention requires attention, check lids and barriers regularly, Overheating is a real risk, temperatures above 32°C can be fatal

Housing and Nest Setup

Myrmecia michaelseni does well in a Y-tong (AAC) nest or a plaster formicarium. These ants are large enough to handle most standard setups, but they can be destructive to softer materials over time. Provide a deep outworld area for foraging, these are active hunters that will chase down prey. Use a test tube setup for the founding queen, then transition to a proper nest once the colony reaches 15-20 workers. Ensure the nest has chambers large enough for the colony to move freely but with some tight spaces that help them feel secure. A water test tube connected to the nest helps maintain humidity. ^[1]

Feeding and Diet

Like other Myrmecia bulldog ants, M. michaelseni is a predator that primarily hunts insects. Offer live prey like crickets, mealworms, and roaches appropriate to the colony size. Smaller colonies can be fed fruit flies, small crickets, and other tiny insects. They also accept sugar water or honey as an energy source, especially once workers are established. Feed protein-rich prey 2-3 times per week for growing colonies, and provide a constant sugar source. Remove uneaten prey after 24-48 hours to prevent mold issues. As the colony grows, increase prey size accordingly.

Temperature and Seasonal Care

Maintain nest temperatures between 24-28°C. These Australian ants prefer warmth but can tolerate room temperature (around 22°C) if needed. A small heating cable or heat mat on one side of the nest creates a temperature gradient that ants can use to regulate their own conditions. During the winter months (June-August in the Southern Hemisphere), reduce temperatures to 10-15°C to simulate their natural seasonal cycle. This diapause period is important for colony health and may trigger reproductive behavior in established colonies. Do not feed during hibernation and reduce moisture.

Handling and Temperament

Myrmecia michaelseni has a painful sting and should be treated with respect. These ants are defensive and will not hesitate to bite or sting if they feel threatened. When working with the colony, move slowly and avoid sudden vibrations. Never handle ants with bare hands, especially once the colony has workers. If you need to move the colony, use gentle coaxing with a paintbrush or let them walk into a transfer container. Their good vision means they will notice movement, approach from the side rather than directly above. The sting is potent enough to cause significant pain, and some people may have allergic reactions.

Colony Founding

Like other Myrmecia species, M. michaelseni queens are claustral founders. The queen seals herself in a chamber and raises the first brood alone, surviving entirely on her stored fat reserves. This process takes several months. Place the founding queen in a simple test tube setup with a water reservoir. Keep her in darkness and do not disturb her during this critical period. Signs of successful founding include the queen remaining sealed in her chamber, then eventually workers emerging. Do not feed the queen during founding, she will not eat and the food will only cause mold problems. Once workers emerge, you can slowly introduce small amounts of prey.

Frequently Asked Questions

References