| Hint | Creature |
| Reported about by the quibbler | |
| Mentioned by Luna in the fifth book | |
| Not to be confused with Erumpments! | |
| Has Fudge an army of them? | |
| Luna claims Fudge has one | |
| Infests mistletoes | |
| Luna claims it to look like a brain | |
| Invisible creatures | |
| Xenophilius claims Luna is fishing them | |
| Luna is looking for them in the lake | |