Semiochemical-eavesdropping
Guides
Formica oreas
Hill Mound Ant
Formica oreas is a thatching ant in the Formica rufa species group, known for constructing conspicuous mound nests from plant material. The species is an aggressive predator with well-documented chemical defense mechanisms. Workers produce alarm-recruitment pheromones from their poison gland (formic acid) and Dufour's gland (hydrocarbons) to coordinate nest defense. These semiochemicals are exploited by blacklegged ticks (Ixodes scapularis) as predator avoidance cues, representing a documented case of eavesdropping on predator communication signals.