Over on the wonderful Wondermark, David Malki gives us collective nouns for a myriad (or other collective noun) of supernatural beings. Click to see the bigger original!
It reminds me of when we visited the Linnean Society during TAM London and saw that Linneus classified a group of potentially mythical beasts, including hydra, satyrs, and . . . pelicans. I got a pic (click to see bigger):