The Bearded Reedling, Panurus biarmicus, is the only known avian species in its genus. It was originally named the Bearded Tit because of its superficial resemblance to the Long-tailed Tit perhaps, but it is definitely not closely related to that bird nor any other tit.
The odd thing though is that the “bearded” part of its name refers to the facial markings of the males. They have long, droopy-looking black patches either side of their bills, whimsically resembling male facial hair but perhaps sideburns or moustaches rather than a beard. I’ve no idea why it wasn’t originally called the Moustached Tit. Either way, it’s not political correctness that is morphing the tit into the reedling it’s simply that it isn’t a tit, as mentioned.
The species is sexually dimorphic, the “clean-shaven” females lack the sideburns/moustaches/beard as well as differing in size and other aspects of their plumage. They’re often quite shy and tend not to show well when it’s windy. That said, you can commonly catch small groups and sometimes larger flocks darting back and forth making their characteristic “pinging”, or “pew-pewing” contact call as the fly. When they settle on a reed, they often shuffle from a lower portion up to the top of the stem. On other occasions, they will dance about the lower parts of the reeds almost at water level.