Mockingbird

First Appearance: Astonishing Tales #6 (June, 1971)
Base of Operations: New York City, New York
Occupation: Adventurer; former counter-terrorist agent, private investigator, government operative, S.H.I.E.L.D. agent, biologist
Group Affiliation:: World Counterterrorism Agency; formerly Secret Avengers, New Avengers, West Coast Avengers, Avengers, Great Lakes Avengers, S.H.I.E.L.D.; partner of Hawkeye; associate of Dr. Wilma Calvin