Myrmecia
Myrmecia chrysogaster
Care Guide
Myrmecia chrysogaster, commonly known as the golden-tailed bull ant, is a striking and formidable species native to Australia. These ants display a powerful and highly active lifestyle, with workers reaching up to 20 mm and queens an impressive 26 mm in length. Their most recognizable feature is the bright orange to golden gaster, contrasting sharply with their dark head and thorax. Unlike many other ants, Myrmecia species have exceptional vision thanks to their large compound eyes, and they are swift, aggressive hunters that rely on sight rather than scent to locate prey. A colony will actively forage for insects, which they subdue with a potent venomous sting, and supplement their diet with sugar water.
One of the most distinctive aspects of Myrmecia chrysogaster is their founding method. They are semi-claustral, meaning that after mating, the queen must leave the nest to hunt for food to feed her first brood. This makes the founding stage particularly challenging for the keeper, as the queen is vulnerable to stress and requires a steady supply of small insects. As the colony grows, it remains relatively moderate in size, typically reaching between 100 and 1,000 workers, but each individual is large, active, and aggressive, making for a spectacular display of natural predation.
Care difficulty
Keeping Myrmecia chrysogaster is considered an advanced undertaking. Their semi-claustral founding demands careful attention and patience — the queen must be fed regularly during the first weeks, and any disturbance can cause her to abandon the nest. The colony’s aggressive nature also requires a secure escape-proof setup, as these ants will readily defend their territory. Additionally, they require a distinct hibernation period at around 12°C during winter, which must be simulated accurately to maintain their long-term health and breeding cycle.
Housing
Providing the right environment for Myrmecia chrysogaster means offering a spacious formicarium with a dry nest area maintained at 40–60% humidity and a temperature range of 22–28°C. A soil or sand-clay substrate that allows for natural tunneling is ideal, as these ants prefer to excavate their own chambers. A large foraging arena is essential, as the colony will hunt actively and requires room to patrol. The nest should be kept in a quiet, dimly lit location — these ants are extremely sensitive to vibrations and sudden light, which can trigger defensive responses.
First days after purchase
Upon receiving your Myrmecia chrysogaster colony, place the formicarium in a calm, dark spot and allow the ants to settle undisturbed for at least 24 hours. During the first few days, offer small, pre-killed insects such as fruit flies or tiny crickets, along with a drop of sugar water, ensuring the queen has easy access to food without needing to forage far. Avoid opening the nest frequently; instead, observe through glass or acrylic. Patience is key — once the colony establishes, you will be rewarded with the remarkable sight of these golden-tailed hunters at work.
