How do Oncidium orchids deceive male Centris bees?

The Oncidium orchid does not use sexual deception to attract pollinators; rather, it employs a strategy known as pseudoantagonism.1

In this process, the orchid flower simulates an enemy insect, which triggers a territorial response in the male Centris bee. The male bee perceives the flower as an intruder and attempts to drive it away from his territory. As the bee strikes at the flower in this defensive behavior, the orchid's pollinia become attached to the bee's head, allowing for pollination when the insect visits subsequent flowers.1