Lasius illyricus

• Monogynous – colonies usually have one queen

👥 Colony Size

• Medium-sized colonies, typically reaching up to 5,000–10,000 workers

⏱ Development Speed

• Moderate growth rate

• Colonies expand steadily, especially in warm conditions

• Queen: ~8–9 mm

• Workers: ~3.5–5 mm

• Omnivorous:

  • Insects (protein)

  • Sugar sources (honey, syrup, fruits)

  • Occasionally seeds or plant matter

• Easy to feed in captivity; prefers fresh insects and sugary liquids

• Humidity:

  • Arena: 40–60%

  • Nest: 50–70%

• Temperature:

  • Arena & Nest: 21–26 °C

• Prefers shaded or slightly moist habitats in the wild

• Active foragers, especially during the day

• Build underground nests or under stones/logs

• Non-aggressive and relatively calm in captivity

• Often seen tending aphids for honeydew

• Suitable for soil or sand-clay formicaria

• Provide moist nest chamber but avoid excess condensation

• Regular access to sugar and protein improves colony growth