Drakea livida, Redmond, Western Australia, on Flickr.
Hammer Orchid, from my "back yard". It visually resembles a female wasp perched atop a stem of grass, and it releases pheromones that fool the male wasps into trying to mate with it.
When that happens, it swings the wasp on the hinge into its pollen resevoir, so the next time the wasp is fooled (or if it has already been fooled), pollen exchanged occurs.
