European fire ant – Myrmica rubra – Queen is not much bigger than worker
European fire ant – The worker bee typically reaches 4 to 5 mm and is equipped with a stinger. The queens are not much bigger and reach a maximum of 6 mm. Most often it lives in forests, meadows, fields or gardens. To live, it needs certain conditions with an appropriate degree of humidity, so they choose regions between lowlands and mountains.
It builds its nests under stones, in clumps of grass or by erecting smaller mounds on the ground. They also live in bark and tree hollows. The colonies are monogamous and polygamous. This species is quite widespread in almost all of Europe, Asia and Japan.