Sometimes the members of the Batfamily form their own groups to fight certain kinds of crime. For Barbara Gordon, during her Oracle years, this came in the form of the Birds Of Prey.
A group of female heroes (and once one male) that often had a rotating door roster that were brought together to fight crime in Gotham. But have also fought crime else. In fact, the Birds have been in both the Pre-52 universe and the New 52 universe. With the latter featuring Barbara back as Batgirl.
Outside of Barbara, frequent members include Huntress, Lady Blackhawk, and Black Canary. With Dove, Starling, Katana, and even Poison Ivy joining the group at various stages.