David Thomas (born Miami, 1953) is an American singer, songwriter and musician.He was one of the founding members of the short-lived proto-punkers Rocket from the Tombs (1974–1975), in which he played under the moniker "Crocus Behemoth," and of post-punk group Pere Ubu (1975–present, intermittently). He has also released several solo albums. Though primarily a singer, he sometimes plays melodeon, trombone, musette, guitar or other instruments.