Myrmecia gulosa
Temperature
20–26 °C
Humidity
50–70%
Colony size
500–1,500
Queen size
24–30 mm
Worker size
15–26 mm
Hibernation temp
14 °C
Diet
Care Guide
Myrmecia gulosa, commonly known as the red bull ant or giant bull ant, is a striking species native to eastern Australia. The queen is a formidable insect, measuring between 24 and 30 mm in length, while workers range from 15 to 26 mm, making them among the largest ants suitable for captivity. Unlike many other ant species, *Myrmecia* workers are monomorphic but exceptionally robust, with powerful mandibles and a potent sting that they use both to subdue large prey and defend the nest. Their large, compound eyes give them excellent vision, and they are known for their bold, solitary hunting style—each worker actively stalks and captures live insects, often many times their own size.
Care difficulty
Keeping Myrmecia gulosa is an advanced undertaking, best left to experienced keepers with a solid understanding of semi-claustral founding and the specific needs of a highly active, aggressive species. The queen must be fed during the founding stage, as she forages outside the nest to nourish her first brood. This requires patience and careful handling, as escaping queens or workers can deliver a painful sting. Once established, the colony requires a constant supply of live insects—crickets, roaches, or flies—supplemented with protein-based foods and sugar water for energy. A varied diet is essential to maintain colony health and growth.
Housing
A formicarium for Myrmecia gulosa must prioritize escape-proofing and ventilation. These ants are agile climbers and can squeeze through tiny gaps, so tight seals and smooth barriers (such as fluon or mineral oil) are mandatory. A spacious foraging area is needed to accommodate their active hunting behavior, while the nest should offer a range of humidity zones between 50 and 70 percent. They prefer temperatures of 20 to 26°C, and unlike many tropical species, they require a genuine winter diapause: hibernation at around 14°C for several months is necessary to regulate their annual cycle and encourage healthy brood production. Provide deep substrate or modular chambers that allow the queen and workers to create their own tunnels—bull ants appreciate naturalistic setups with sand or clay-based soils.
First days after purchase
Upon receiving your Myrmecia gulosa colony, transfer them into their prepared formicarium with minimal disturbance. Place the setup in a quiet, dimly lit area and allow the ants several days to settle. Do not offer large prey immediately; start with small insects or diluted honey water. Monitor the queen’s condition closely during the first week—if she is semi-claustral, she will need to forage, so ensure the outworld is securely enclosed. Avoid opening the nest unnecessarily, as stress can delay founding. With patience and careful observation, you will witness the remarkable hunting prowess and bold personality that make this species a true challenge for dedicated ant keepers.