Sept. 18 (UPI) -- John David "JD" Souther, who was well known for his Eagles collaborations, has died. He was 78 years old. Souther, who helped pen the Eagles' "New Kid in Town," "Best of My Love" and "Heartache Tonight," died "peacefully" at his home in New Mexico on Tuesday, according to an obituary posted to his website.

The Eagles paid loving tribute to their late friend and collaborator J.D. Souther on Wednesday (Sept. 18) in a heartfelt message posted just a day after the singer/songwriter/actor died at 78. "We have lost a brother,

We have lost a brother, a friend and a brilliant collaborator, and the world has lost a great songwriter, a pioneer of the Southern California sound that emerged in the 1970s,

The Eagles have paid tribute to JD Souther, the songwriting collaborator of some of their biggest hits who passed away on 17 September at his home in New Mexico at the age of 78. He had been due to start a solo tour with Karla Bonoff on 24 September.