amazing sex life of orchids
One study found this preference was so strong that: "And indeed, male bees have the hots for exotic perfume. Given the choice between a dummy infused with the pheromone cocktail produced by the girl bee next door and another one with the bouquet of a female from another population, the males visited the scent that was new to them 50% more often. But orchid scent, with yet greater differences in the pheromone mix, was even more popular. In choice tests it attracted males up to five times as often as that of a local female. Manipulating the natural perfume blend of the bees to mimic that of the orchids also nearly doubled the bees' attractiveness to males."