Myrmecia tarsata
Temperature
20–26 °C
Humidity
50–70%
Colony size
300–1,500
Queen size
20–26 mm
Worker size
14–22 mm
Hibernation temp
14 °C
Diet
Care Guide
Myrmecia Tarsata is one of the most striking and formidable species in the ant world, commanding immediate attention with its sheer size and powerful presence. Native to Australia, these ants are often called “bull ants” or “jack-jumpers” for good reason — they are highly active, visually acute, and armed with large mandibles and a potent sting. The queen, measuring between 20 and 26 mm, is a true giant among ants, while workers range from 14 to 22 mm, displaying only minimal size variation within the colony. Their bodies are a beautiful mix of deep black and reddish-brown, with long, agile legs that make them swift hunters.
What truly sets Myrmecia Tarsata apart is not just their size but their unique founding style and predatory nature. These ants are semi-claustral, meaning the founding queen must leave the nest regularly to hunt for food — she cannot seal herself away and rely solely on her body reserves. This makes the early stages of colony development particularly demanding, requiring patience and careful observation from the keeper. Once established, a mature colony can contain anywhere from 300 to 1,500 workers, each an eager and capable hunter.
The diet of Myrmecia Tarsata is entirely based on live prey and protein sources. In the wild, they are active foragers that capture insects and other arthropods with speed and precision. In captivity, they thrive on a steady supply of crickets, cockroaches, mealworms, and other feeder insects. They will also accept protein-rich foods like boiled egg or cooked chicken, and sugar water can be offered as a supplemental energy source — though they are far less interested in sugars than many other species. Fresh water must always be available, ideally in a test tube or a small dish with a sponge to prevent drowning.
Care difficulty
Keeping Myrmecia Tarsata is suited only for experienced ant keepers. The advanced difficulty stems from several factors: the semi-claustral founding requires the keeper to provide live prey during the queen’s solitary phase, and the ants themselves are intensely aggressive and fast-moving. Escape prevention is absolutely critical — these ants can climb smooth surfaces and deliver a very painful sting. Additionally, they require a distinct hibernation period at around 14°C during the cooler months to maintain a healthy annual cycle. Without proper hibernation, the colony may fail to thrive.
Housing
A formicarium for Myrmecia Tarsata must prioritise security and visibility. Because of their size and strength, all connections and tubing should be securely fastened, and lids must be tight. The nest area should be kept between 20 and 26°C, with humidity levels of 50 to 70%. An outworld with plenty of open space for hunting is essential — these ants need room to move and ambush prey. Sand or soil-based substrates work well for the nest, and a heating mat placed under part of the setup allows the colony to thermoregulate. During hibernation, move the entire setup to a cool, dark location and reduce feeding.
First days after purchase
Upon receiving your Myrmecia Tarsata colony — whether a single queen or a small group of workers — transfer them carefully into their new formicarium. Place the setup in a quiet, low-vibration area and resist the urge to disturb them. In the first few days, offer small, soft-bodied prey items such as pinhead crickets or flightless fruit flies, and ensure a water source is always accessible. Observe from a distance; these ants react instantly to movement and light. With patience and steady management, you will be rewarded with one of the most dynamic and awe‑inspiring colonies in the hobby.