Tetramorium delagoense - "Delagoense Pavement Ant"
Tetramorium delagoense is a fascinating ant species that closely resembles Tetramorium simillimum in size, form, and sculpture. These ants are generally yellowish-brown to black in color, with variations in shade. A distinguishing feature is the presence of one or two stiff hairs projecting from each side of the head, just behind the eyes. Workers are typically small, ranging from 2.1 to 2.9 mm in length, and have dense reticulate-punctate or granular ground sculpture on their heads and bodies. Their nests are primarily found in the soil, under rocks, or in decaying wood. While often predaceous, some Tetramorium species are also known to be granivorous. They are known for their adaptability and can be found in a wide range of habitats, from humid rainforests to arid savannahs.
- Difficulty: Easy
- Origin & Habitat: Afrotropical Region (Angola, Comoros, Eswatini, Kenya, Mozambique, Nigeria, South Africa, Sudan, United Republic of Tanzania), Malagasy Region (Madagascar, Mayotte), and Palaearctic Region (Israel). in Humid rainforests, arid savannahs, deserts, soil, decaying wood, leaf litter, under stones.
- Colony Type: Monogyne, though pleometrosis can occur initially with queens being killed off until one remains., claustral founding.
- Size & Growth:
- Queen: 7-8mm
- Worker: 2.1-3.25mm
- Colony: Medium (thousands). Fast growth.
- Antkeeping:
- Temperature: These ants are quite adaptable to temperature changes. An ideal range is between 21-27°C (70-80°F). Maintaining temperatures within this range will accelerate brood development and promote faster colony growth..
- Humidity: They prefer moderately dry nests with a humidity gradient. Aim for 50-60% humidity in part of the nest, with other areas drier. Ensure good ventilation to prevent mold..
- Diapause: Required. 2-4 months at 5-10°C.
- Nesting: Tetramorium species are known for nesting in soil, decaying wood, or leaf litter. For captive setups, a formicarium with a soil or sand-clay mix substrate is ideal, allowing them to dig. They are excellent at finding escape routes, so a secure acrylic nest is recommended..
- Behavior: Medium (towards other ants/prey, low towards handler) aggressiveness.
- Common Issues: Mold in nest, Humidity fluctuations, Escape artists (due to small size and exploratory nature).
One unique aspect of Tetramorium delagoense, and indeed many Tetramorium species, is their impressive colony growth rate. Once a queen establishes her initial brood and the first workers arrive, you'll often see a rapid increase in colony size. This makes them a highly rewarding species for new antkeepers eager to see a bustling formicarium quickly. To optimize this growth, maintaining consistent temperatures around 21-27°C (70-80°F) is key, as warmer conditions significantly speed up their development from egg to worker.
When setting up a nest for your Tetramorium delagoense colony, remember their natural tendency to nest in soil, under stones, or in decaying wood. This means they'll thrive in formicaria that allow for digging, such as those with a sand-clay mix or natural soil. However, be warned: these ants are notorious escape artists! Their small size combined with their exploratory nature means even tiny gaps can become an exit point. Opting for a secure acrylic nest with tight seals is highly recommended to prevent any unwelcome foraging expeditions in your home.
Feeding your Tetramorium delagoense colony is relatively straightforward as they are omnivores, readily accepting a wide variety of foods. Their diet in the wild includes insects, sugary substances like honeydew, and even seeds. For captive colonies, a balanced diet of feeder insects (like crickets, mealworms, or fruit flies) for protein and sugar water or honey for carbohydrates will keep them thriving. Some keepers also note that these ants can digest starches from seeds, making them a good supplementary food source. Consistent feeding, especially of protein for brood development, is crucial for a booming colony.
Like many temperate ant species, Tetramorium delagoense requires a period of diapause, often referred to as hibernation, during the cooler months. This crucial resting phase typically spans from late October to early March and is vital for the queen's health and the colony's long-term vitality. During diapause, the queen will stop laying eggs, giving her a much-needed break. Maintain a cooler temperature, ideally between 5-10°C (41-50°F), during this time. Failing to provide a proper diapause can negatively impact the queen's lifespan and future egg production.
While generally harmless to humans, Tetramorium delagoense workers do possess a mild sting. However, this sting is typically described as a minor irritation, akin to a slight itch that fades after a few hours, and they rarely sting handlers unless provoked. This low risk makes them a suitable species even for beginner antkeepers. Their aggressive nature is usually reserved for territorial disputes with other ant colonies, a behavior sometimes observed in large aggregations, rather than towards human interaction.
