The theft of the century in the insect world: a nest containing rare narrow-headed ants has disappeared from a protected English nature reserve. One anthill has between 1000 and 5000 individuals and queens, living for 25 years. For the population that holds its last stronghold in Chudley Knighton Heath, this is a biological disaster. The police are looking for whoever stole the state treasure. - If you have seen suspicious entomologists.