Iron Butterfly is an American rock band that rose to prominence in the late 1960s with their pioneering work in the psychedelic and hard rock genres. Characterized by heavy, riff-based song structures and organ-dominated sound, the band's most notable work is the 17-minute track "In-A-Gadda-Da-Vida," often cited as one of the first examples of hard rock and heavy metal music. Iron Butterfly's influence on subsequent rock music has been significant, particularly in the development of heavy metal. Notable members include Doug Ingle, whose keyboard and vocal work largely defined the band's sound, and Ron Bushy, the drummer known for his distinctive solo in "In-A-Gadda-Da-Vida".