Quote Originally Posted by theLab View Post
That effect, Robert, happens at some orchids usually and ... is done on purpose. Some insects don´t serve as pollinators only but some are mean pollen-thieves as the pollinium is rich on proteins and an ideal nurishment for the insects´ brood. Especially ants and wesps are among those thieves.
Another reason for the phenomena you described propably is that the original pollinator shouldn´t visit and disturb the flower anymore.
Thanks for the infos.