Myrmecia midas

Myrmecia midas

Myrmecia midas is a medium-sized nocturnal bull ant native to the coastal regions of eastern Australia, particularly New South Wales and Queensland. Workers have a head width of approximately 3.9mm and feature the characteristic large eyes and powerful mandibles of bull ants ^[1]. This species is part of the gulosa species group ^[2]. Unlike most ant species that forage during the day, M. midas is strictly nocturnal, restricting its foraging activity to the low light periods of twilight and night ^[1]. The species is renowned for its exceptional visual navigation abilities, using both terrestrial landmarks and polarized skylight to find its way between nest and foraging trees ^[3]. Nests are typically located at the base of eucalyptus trees, with foragers traveling to the same specific trees each night, sometimes as far as 14 meters from the nest ^[4].

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Eastern Australia (New South Wales, Queensland), coastal woodland and forest areas with eucalyptus trees ^[5]. Nests are located at the base of trees, typically within 30cm of the trunk ^[6].
• Colony Type: Likely single-queen colonies (monogyne) based on typical Myrmecia genus patterns, though colony structure has not been specifically documented for this species.
  • Colony: Monogyne
  • Founding: Claustral
• Size & Growth:
  • Queen: Not directly measured in available research, estimated 12-15mm based on genus patterns
  • Worker: Head width 3.91 ± 0.11mm ^[1]
  • Colony: Estimated several hundred workers based on related Myrmecia species
  • Growth: Moderate, estimated 8-12 weeks from egg to first worker based on genus patterns
  • Development: 8-12 weeks (estimated based on genus patterns for Myrmecia species) (Development time is estimated, no specific measurements available for M. midas. Temperature will significantly affect development speed.)
• Antkeeping:
  • Temperature: Keep at room temperature (18-24°C). As a nocturnal species from coastal Australia, they prefer cooler conditions than many tropical ants. Avoid excessive heat.
  • Humidity: Moderate humidity (50-60%). Provide a moist nest chamber but ensure good ventilation to prevent mold.
  • Diapause: No, as an Australian species adapted to mild coastal climate, they do not require formal hibernation. However, a slight cooling period during winter months (15-18°C for 2-3 months) may benefit colony health.
  • Nesting: Y-tong (acrylic) nests work well for this species. Provide a nest chamber scaled to their medium size with multiple connected chambers. Include a water tube for humidity. Place the nest in a dark area since they are nocturnal and light-sensitive.
• Behavior: M. midas is a docile bull ant species compared to some relatives, but workers will defend the nest if threatened. They have a painful sting similar to other Myrmecia species. Foraging occurs at night starting just after sunset, with workers returning before morning twilight ^[3]. They are excellent visual navigators and will scan their surroundings when displaced or confused, this scanning behavior is normal and helps them orient. Escape risk is moderate, they are medium-sized ants but strong climbers. Use fluon on any connections and ensure the outworld has high walls.
• Common Issues: light sensitivity can cause stress, keep colony area dim and cover the nest to reduce light exposure during observation, overheating is a risk, keep away from direct sunlight and heat sources, colonies may be slow to establish, patience is needed during the founding stage, wild-caught colonies may have parasites that cause colony failure

Housing and Nest Setup

Myrmecia midas does well in a Y-tong (acrylic) nest with chambers scaled to their medium size. The nest should have multiple connected chambers to allow the colony to expand. Include a water tube or hydration chamber to maintain humidity. Place the nest in a quiet, dimly lit area of your room, these ants are nocturnal and light-sensitive, so covering the nest with a dark cloth during observation helps reduce stress. The outworld should have high walls (at least 3cm) and smooth surfaces since they are good climbers. Use fluon or petroleum jelly on any connections to prevent escapes. A naturalistic setup with a dirt chamber can also work well, mimicking their natural nest sites at the base of trees. ^[6][5]

Feeding and Diet

Like other Myrmecia species, M. midas is predatory and will accept various insects. Offer small live prey such as fruit flies, small crickets, and mealworms. They also accept sugar sources, a small dish of honey water or sugar water can be provided, though protein should make up the majority of their diet. Feed them 2-3 times per week, removing any uneaten prey after 24 hours to prevent mold. Queens in the founding stage do not need to forage, they seal themselves in and survive on stored fat reserves until their first workers emerge.

Temperature and Lighting

Keep your colony at room temperature, ideally between 18-24°C. This species is adapted to the cooler conditions of Australian coastal evenings and does not tolerate heat well. Avoid placing the nest in direct sunlight or near heating devices. Since they are strictly nocturnal, they are most active during evening and night hours. You may notice reduced activity during bright daylight hours, this is normal. A slight temperature drop during winter months (around 15-18°C) mimics their natural seasonal cycle and may benefit colony health, but formal hibernation is not required. ^[1]

Behavior and Observation

One of the most fascinating aspects of M. midas is their exceptional visual navigation. Researchers have documented that foragers perform 'scanning' behavior, they stop and rotate their heads to look in different directions, building a mental map of their surroundings ^[6]. When you first set up your colony or move them to a new location, you may see this scanning behavior as they orient themselves. They learn specific foraging routes and return to the same trees each night. In captivity, they will establish predictable patterns moving between the nest and feeding areas. They are generally less aggressive than some other bull ant species, but will sting if provoked or when defending their nest.

Colony Development

Myrmecia midas colonies grow moderately fast once established. The queen seals herself in a claustral chamber and raises the first brood alone without foraging. First workers (nanitics) are smaller than mature workers but will immediately begin helping with colony tasks. Growth rate depends on temperature and feeding, warmer temperatures within their range speed development, while cooler temperatures slow it. Expect 8-12 weeks from egg to first worker at optimal temperatures. Colonies may take several years to reach several hundred workers. Patience is key during the founding stage, avoid disturbing the queen's chamber unnecessarily.

Frequently Asked Questions

References