Stingless bees are a highly diverse group of tropical bees that are all highly eusocial and possess the widest range of foraging communications systems known in social insects. Their communication repertoire includes point source odor-marking, partial odor trails, complete odor trails, polarized odor trails, potential piloting, and potential referential communication. Why has this diversity of strategies evolved, and, more interestingly, why do stingless bees and honey bees appear to share the ability to referentially encode food location at the nest? I suggest that referential communication evolved, in part, as an anti-espionage strategy to escape from pressures of olfactory eavesdropping by aggressive, mass-recruiting and eavesdropping stingless bee species. Specifically, I will present data on interceptive olfactory eavesdropping and show that foragers actively monitor odor mark levels. I will also explore how stingless bees use visual cues to find and orient towards odor trails, strategies that can be exploited by intended and unintended receivers.