Odontomachus haematodus
Temperature
24–28 °C
Humidity
70–90%
Colony size
200–1,500
Queen size
11–13 mm
Worker size
9–12 mm
Diet
Care Guide
Odontomachus haematodus, commonly known as the trap-jaw ant, is a striking species that captivates keepers with its lightning-fast mandibles and bold hunting style. Workers range from 9 to 12 mm in length, while the queen reaches 11–13 mm — both share the same robust build, large eyes, and elongated, snapping jaws that can close at speeds of over 140 kilometers per hour. This remarkable adaptation is used to ambush prey, fling intruders away, and even launch the ant itself to escape danger. Colonies are moderate in size, typically numbering between 200 and 1,500 workers, and are founded claustrally: the queen seals herself in a chamber and raises the first workers on her own stored reserves, requiring no feeding until the first workers emerge.
The diet of Odontomachus haematodus is almost exclusively insect-based, reflecting their predatory nature. Live prey such as crickets, roaches, and mealworms form the core of their nutrition, though they will readily accept freshly killed insects. Protein is essential for brood development, and a steady supply of sugar water or honey water supports adult worker energy needs. Unlike seed-harvesting species, these ants show little interest in plant-based foods; keepers should focus on providing a varied insect menu and avoid feeding sugary fruits that may ferment.
Care difficulty
Keeping Odontomachus haematodus is considered advanced and is best suited for experienced hobbyists. Their powerful sting — which, for some individuals, can be quite painful — demands respect during maintenance. Additionally, these ants are highly sensitive to vibration and sudden disturbance, especially during the founding and early growth stages. The need for consistently high humidity (between 70 and 90 percent) and a temperature range of 24 to 28°C requires careful monitoring with hygrometers and heating cables. Escape-proofing is critical: workers are agile climbers and can exploit even minor gaps.
Housing
A suitable formicarium for Odontomachus haematodus should offer a spacious nest area with substrate that retains moisture, such as clay, sand-loam mixes, or porous foam. The foraging arena must be securely lidded and well-ventilated to prevent condensation. Humidity levels can be maintained by regularly moistening the nest substrate or using a hydration system, while a heat mat on a thermostat ensures stable temperatures. These ants do not require hibernation, so year-round warmth and moisture are necessary. Provide a hiding place or darkened area in the nest, as trap-jaw ants prefer subdued lighting.
First days after purchase
Upon receiving your Odontomachus haematodus colony, transfer them into the prepared formicarium and place it in a quiet, dimly lit location. Resist the urge to open the setup or feed heavily for the first 24 to 48 hours — give the ants time to acclimate and explore their new home. Offer a small, freshly killed insect (like a pinhead cricket) and a drop of sugar water once you see workers moving around calmly. Check that humidity levels remain high and that the nest area does not dry out. Patience and minimal interference during these early days will help the colony settle in and begin their remarkable growth.