than 30 years in captivity. Curly Twiford died on April 5, 1956, at the age of 60. See also Bird intelligence Grip (raven) List of individual birds References External links A Shroud of Thoughts: Jimmy the Raven: Frank Capra's Avian Star The Unsung Joe: Koko the Raven – one of Jimmy's most prominent stand-ins Animal actors Individual birds Ravens 1934 animal births 1950s animal deaths