Today's wasp of the day is the mossy rose gall wasp (Diplolepis rosae)
Credits: photo 1, photo 2
Also known as the rose bedeguar gall wasp, moss gall wasp, or robin's pincushion. Some of these names actually have their roots in folklore. These odd pompoms that can suddenly appear on wild roses were assumed to be the work of woodland faefolk. Knowing that they're actually made by tiny wasps that manipulate the plant into forming a structure that houses and feeds its young honestly still sounds like fairy business though.
While typically the galls wasps make don't harm their host plant, there is a tendency for mossy rose galls to occur in higher number on weak or young plants and so the sight of these fuzzies can be considered a warning sign.