From outside, an anthill looks like a heap of pine needles. But slice it open, and a whole house appears: ants swarm on top, eggs and larvae lie in the nursery, food is stored lower down — and deepest of all, the queen lays her eggs.
Worker ants
Eggs and larvae
The queen
4 floors
top, nursery, food store and queen's chamber
up & down
ants move eggs and larvae to follow the sun's warmth
look only
wood ants spray formic acid — watch from a little way off