In November 1964, saxophonist Henri Bource – who was also an amateur underwater photographer and film-maker – had his leg bitten off by a shark while diving.
He indicated to the cameras to keep rolling and the footage was used in a documentary called The Savage Shadow. Bource was back playing with the band three weeks after he lost his leg.
In 1983, The Thunderbirds re-formed briefly for a 1960s revival concert. The line-up was Charles Gauld, Henri Bource, Murray Robertson, Gordon Onley and Harold Frith. In 1996 the original Thunderbirds Harold Frith, Laurie Bell, Henri Bource, Peter Robinson and Murray Robertson got together for a one-off concert at The Elvis Presley Fan Club dance at the Moorabbin Town Hall.
Henri Bource died of leukaemia on 4 September 1998.
In 2007 the group celebrated 50 years together with a group of concerts at leading Melbourne venues coinciding with the release of their new CD The Thunderbirds in the 21st Century. They continue as the original group to perform and record.