NARRATOR:'In a leafcutter colony there is a queen ant, and she is much bigger than the other ants. And her job is to lay eggs. NARRATOR:'Then there are lots of different types of worker ant.

Narrator: At first glance, a fire ant hill — or mound, as it's properly called — looks impossibly small. And yet, a colony of up to 250,000 ants call it home. But here's the secret ...