The wings are functional. There isn't really the room to let him make that known, nor do I think now is the time...

Amaranth and I can speak without words. And if he chooses, others can hear him as well. He's a very special familiar.

[As he had already shown Kat and Alainn, but for now the flywacket will be quiet. He doesn't want to scare Buffy too much just yet.]