
Lasius fuliginosus - colony rescued, Heesch, Netherlands
This is the "after" shot of the nest I accidentally exposed by tipping over a rotten log. Note the timing of the photos. From this....
...to this after situation is a mere 6 minutes. From this...
To right now is only 3 minutes. In a matter of minutes, hundreds of ants collectively secured all their larvae and pupas, and then secured themselves. As if nothing ever was here. Incredible team work, coordination and work ethic.

Lasius fuliginosus is a species of ant in the subfamily Formicinae. Workers have a black shiny colour and a length of about 4–6 mm, females are larger and small males reach a length of 4.5–5 mm. The head is heart-shaped.