Birds of Prey, Batman Wiki

Oracle contacted Black Canary to go on a mission for her. From then on the Birds of Prey was a team. The original recruit of Oracle's was actually Power Girl. The Birds of Prey spent the first part of their existence operating out of the Gotham Clock Tower, and for many missions the Bird were essentially just a partnership of Oracle and the Black Canary. After Black Canary was kidnapped by the villain Savant, Oracle contacted the Huntress for help, eventually taking her in as a permanent agent

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