Iron Butterfly
American rock band
Iron Butterfly is an American rock band formed in San Diego, California, in 1966. They are best known for the 1968 hit "In-A-Gadda-Da-Vida", providing a dramatic sound that led the way towards the development of hard rock and heavy metal music. Although their heyday was the late 1960s, the band has been reformed with various members with varying levels of success with no new recordings since 1975. Their second album, In-A-Gadda-Da-Vida (1968), remains a best-seller, and Iron Butterfly was the first group to receive an in-house platinum album award from Atlantic Records.
According to music critic Manish Agarwal of Time Out, "Iron Butterfly blended hard rock with ordinate, acid-friendly textures." Mark Deming of AllMusic stated that they were one of the first musical groups to fuse the two styles in this way, and described their sound as a "blend of trippy musical exploration and open-ended jams with a hard, distorted attack".
History
Formation and Heavy (1966–1968)
The band formed in 1966 in San Diego. The original members were Doug Ingle (vocals, organ, formerly of Jeri and the Jeritones and Palace Pages, Iron Butterfly's forerunner), Jack Pinney (drums), Greg Willis (bass), and Danny Weis (guitar, also of Palace Pages). The group were soon joined by vocalist and tambourine player Darryl DeLoach. DeLoach's parents’ garage served as the site for their almost nightly rehearsals.
Jerry Penrod replaced Willis after the band relocated to Los Angeles in the summer of 1966.
Begin with the source’s own compact description: “Iron Butterfly” is american rock band. The dossier treats that line as a proposition to test through Iron, Butterfly and American, not as a finished interpretation.
Why this record matters
The phrase “american rock band” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Aug 31, 2026. The linked authority identifier is Q743353. VIAF identifies the subject as 168125671. The Library of Congress control number is nr89011442. 4 of 4 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank. The first chronological checks are 1966, 1968 and 1975.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Iron Butterfly”, its source revision and the description used here.
- Expand the search: follow Iron Butterfly primary sources, Iron Butterfly archive and Iron research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Iron Butterfly”?
- Which cited source is closest to the event, object or claim?
- What terminology or title could unlock a more precise catalogue search?
Search terms from this dossier
This entry incorporates text from “Iron Butterfly” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.