Formed in Los Angeles, the band consisted of Shele Pinizzotto (guitar), Rosemary Butler (bass), Sherry Hagler (keyboards), and Olivia "Liver" Favela (drums).
Pinizzotto, Butler, and Hagler grew up in Los Angeles and Orange County and played together in bands during their high school years.
When Birtha made return visits to Los Angeles, they would often play Whisky a Go Go and The Troubadour, as well as a club in Glendale called The Sopwith Camel.
The band continued touring and was on the road for more than 250 days a year, performing with such acts as Fleetwood Mac, Alice Cooper, Poco, Black Oak Arkansas, Cheech & Chong, B.B.
[4] The band's song "Too Much Woman for a Hen Pecked Man" was featured in the soundtrack of the 2013 Chris A. Jiménez-directed Spanish film, Perdedores Natos (Natural Born Losers).