Tetramorium immigransSpecies Introduction

Species Introduction Claustral and pleometrotic. Queens can found on their own or together. However, once workers arrive, the queens will fight until only one queen is left. No food is needed during founding. Widespread across the continental US. Originally native to Europe, T. immigrans is thought to be one of the first introduced species in the US, and has spread quite far. Forgiving species that can roll with the punches. Formicarium Substrate or hydrostone nests work fine. These ants are content in most nests (within reason). A secure nest and a fluon barrier for the outworld is recommended for these small ants. Moderately warm. We suggest a gradient of 75–85°F across the setup. 3/8" works well for this smaller species. Water & Humidity Moderately humid. T. immigrans originate in semi-arid climates and therefore don't want their nest super humid. A humidity gradient across the nest is often the best strategy. Recommended to use TrapJaw Labs PVA sponges during founding for improved success rates and more nanitics. Keep a liquid feeder with water (distilled, purified, or spring) in the foraging area at all times. Carbohydrates These ants do benefit from carbohydrates. Occasional small honey-water or sugar-water drop in the outworld is fine. We recommend providing sugar-water (we use our Ant Nectar Mix) and fresh-water liquid feeders in the outworld at all times. Protein Protein-loving. We suggest feeding protein 2–3 times a week. TrapJaw Labs feeds our T. immigrans colonies with pre-killed D. melanogaster and D. hydei fruit flies. Once the colony is larger, they will take most feeder insects. Two to three times per week. Increase amounts to scale with brood development. Seeds This species will consume seeds if the opportunity presents itself but it is not a major component of their diet, typically. You can offer them seeds if you'd like to but it's completely optional. T. immigrans prefers small seeds that are easy for them to handle. The TJL Seed Mix is a good place to start if unsure of what kind to offer. Every other week (optional) Maintenance Week 1: Dark, warm, gently humid, and undisturbed. Do not feed. Weeks 3–5: First workers appear. Start protein 2–3×/week and offer carbohydrates. Months 2+: Growing colony. They'll take a lot of food if you want to give it to them. Diapause is not required for this species. Care Summary Protein 2–3×/week (more is better) Sugar via small open drops Moderate humidity Gradient 75–85°F Twice per week: Offer pre-killed protein, clear leftovers within 24h Once per week: Place a small honey-water/sugar-water drop in outworld Every other week: Top up nest water