Mockingbird (Barbara "Bobbi" Morse) is a fictional character appearing in American comic books published by Marvel Comics. Mockingbird first appeared in Astonishing Tales #6 in 1971 as a supporting character and eventual love interest of Ka-Zar. She is soon revealed to be a highly trained agent of S.H.I.E.L.D., as well as a Ph.D in biology. She first uses the moniker "Mockingbird" in Marvel Team-Up #95 (July 1980), and goes on to be a member of several Avengers teams.