*Colobopsis truncata*

Are you looking for an absolutely extraordinary ant species with behavior unique worldwide? Colobopsis truncata (also known as the plug-head ant or door-closing ant) is a true biological marvel directly from the deciduous forests of Southern and Central Europe.

The absolute highlight of this species are the specialized major workers (soldiers) and the queens: their heads are completely flat and truncated at the front. In their natural deadwood habitat, the colony uses this head as a living nest door. A soldier perfectly barricades the circular entrance hole with its forehead.