It was stated in this thread:
That Birdbanes would match up slightly on par, or slightly above par with Waghs. On birds only of course. Since the large skill upgrade, are these now a viable choice on Greater Colibri? Just a small test on Lesser Colibri, I was hitting for anywhere between 60-100(Waghs) and 80-120(Birdbanes). My highest hit with Birdbanes was a 201 critical hit.