Question:
Bernard Mathew Leadon III (pronounced led-un; born July 19, 1947) is an American musician and songwriter, best known as a founding member of the Eagles. Prior to the Eagles, he was a member of three pioneering and highly influential country rock bands: Hearts & Flowers, Dillard & Clark, and the Flying Burrito Brothers. He is a multi-instrumentalist (guitar, banjo, mandolin, steel guitar, dobro) coming from a bluegrass background. He introduced elements of this music to a mainstream audience during his tenure with the Eagles.
Leadon was the last original member to join the Eagles, a band initially formed by guitarist/singer Glenn Frey, drummer/singer Don Henley, and former Poco bassist/singer Randy Meisner. Leadon is often credited with helping shape the band's early country-rock sound, bringing his strong sense of harmony as well as his country, bluegrass and acoustic sensibilities to the group. Instruments he played during his tenure in the band were electric guitar, B-Bender, acoustic guitar, banjo, mandolin, dobro and pedal steel guitar. Upon the release of their debut album, Eagles, the group met with near instantaneous success, due largely to the strength of their hit singles, "Take It Easy", "Peaceful Easy Feeling" and "Witchy Woman" (co-written by Leadon and Henley), all of which highlighted Leadon's multi-instrumental talent on electric guitar, B-Bender, banjo, and harmony vocals. Their follow-up, Desperado, was another strong country-rock venture highlighted by the classics "Tequila Sunrise" and the title track. Leadon had a prominent role on the album, but it was met by surprisingly lukewarm reviews and lackluster sales. As a result, the band attempted to distance itself from the "country rock" label for their third album On the Border. In doing so, Leadon encouraged the group to recruit his old friend, guitarist Don Felder, to the band. The result was the guitar-heavy top ten hit "Already Gone". The album also included "My Man", Leadon's touching tribute to his old bandmate and friend, Gram Parsons, who had died of a drug overdose the year prior at Joshua Tree National Monument in southeastern California. With the wild success of On the Border and its follow-up smash, One of These Nights, tension within the band grew, as Leadon grew increasingly frustrated by the band's direction away from his beloved country and bluegrass and toward album-oriented stadium rock. He famously quit the band in 1975 by pouring a beer over Glenn Frey's head. He later cited a need to get healthy and break the vicious cycle of touring, recording and heavy drug use that was rampant within the band. Upon his departure, Asylum Records released Their Greatest Hits (1971-1975), which highlighted the band's Leadon years and went on to become the biggest-selling album of all time for sales in excess of 42 million units, awarded to the band members by the RIAA. He was replaced by former James Gang guitarist/singer, Joe Walsh. Although it has long been believed that he left because he was dissatisfied with the band moving into rock and roll, Leadon denies it and said in 2013: "That's an oversimplification; it implies that I had no interest in rock or blues or anything but country rock. That's just not the case. I didn't just play Fender Telecaster. I played a Gibson Les Paul and I enjoyed rock & roll. That's evident from the early albums."
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how long was he with the Eagles?

Answer:

Question:
Pitchford was born in Honolulu, where he attended Catholic schools, graduating in 1968 from Saint Louis High School. He began his performance career as an actor and a singer with the Honolulu Community Theatre (now Diamond Head Theatre), the Honolulu Symphony Orchestra and the Honolulu Theatre for Youth, among others. While studying at Yale University, Pitchford performed with numerous campus drama groups, but his focus gradually turned off-campus, where he worked with the Wooster Square Revival, an experimental theatre company that offered acting opportunities to recovering addicts and alcoholics. In 1969, Pitchford returned to Honolulu as an assistant to authors Faye Hammel and Sylvan Levey in updating the popular guidebook Hawai'i on $5 and $10 A Day, and researching Trans World Airlines' Budget Guide to Hawai'i, the first of a series of guidebooks that would eventually turn into the popular series TWA Getaway Guides.
As a result of performing his early songwriting efforts in cabarets around Manhattan, he was invited to write with such composers as Stephen Schwartz, Alan Menken and Rupert Holmes. In 1979, he collaborated with recording artist and cabaret performer Peter Allen to write new songs for Allen's one-man Broadway revue, Up In One. With composer Michael Gore, Pitchford collaborated on three songs for Alan Parker's 1980 motion picture Fame; these were "Red Light," a disco hit for singer Linda Clifford; the symphonic/rock finale "I Sing the Body Electric;" and the title song "Fame," which became a multi-platinum, international best seller for Irene Cara. That song earned Gore and Pitchford an Oscar, a Golden Globe, and a Grammy nomination for Song of the Year (1981). They also received a Grammy nomination for Best Soundtrack Album for a Motion Picture, Television or Other Visual Media. When Pitchford was signed by Warner Brothers Publishing (1981) he began collaborating with a variety of songwriters. Among the first songs whose lyrics he wrote in collaboration with composer Tom Snow was "Don't Call It Love," which was first recorded by Kim Carnes on her 1981 album Mistaken Identity; the selection charted in the U.S. country singles top-ten for Dolly Parton in 1985 and was named the BMI Country Song of the Year. For the ill-fated 1981 movie The Legend of the Lone Ranger, Pitchford wrote a narrative ballad, "The Man In the Mask." This was spoken (throughout the movie) and sung (at its beginning and end) by Merle Haggard. "You Should Hear How She Talks About You," another Snow/Pitchford composition, was a Top 5 hit for Melissa Manchester for which she won the Grammy Award for Best Female Pop Vocal Performance in 1983. That same year, Pitchford, Kenny Loggins and Steve Perry wrote and composed "Don't Fight It," a Top 20 hit that was Grammy-nominated in the Best Pop Vocal Duo category. With musical director Michael Miller, he wrote the theme song for the weekly dance-music show Solid Gold (1980-88).
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who else did he collaborate with?

Answer:
Michael Gore,