David Lander (June 22, 1947 – December 4, 2020) performed the speaking voice for Thumper in A Bug's Life. Aside from this, Lander also was known for his role as Andrew "Squiggy" Squiggman in the sitcom Laverne & Shirley, and for voicing Smartass, the lead weasel of Judge Doom's Toon Patrol in the 1988 Disney-Amblin film Who Framed Roger Rabbit.
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