Michaelas thread on Silver Blue was getting pretty long or I would have extended it. I would like to say that the African Hawk moths in SE africa can have very long tongues, so thy like to eat the nectar of plant species with very long corollas like Sansevierias. Read the section on ADULTS on the Wikipedia page link.
Can anyone mention other sansevieria pollinators with any certainty? Sources appreciated.
Here is a link that might be useful: Hawk Moth