For those who didn't know: This is Robert Plant, the vocalist of Led Zeppelin. A dove spontaneously landed on his hand during a concert. They (the doves, not the band) were released from cages at the end if Stairway to Heaven, and one of them decided to land instead of flying off.
In June 1973, Led Zeppelin played a legendary concert at Kezar Stadium in San Francisco, where an unforgettable moment took place. As the band performed before over 50,000 fans, white doves were released during the closing of “Stairway to Heaven.” While most of the birds flew off into the crowd, one returned to the stage, landing unexpectedly on Robert Plant’s hand. The scene was striking: Plant, cigarette and drink in hand, calmly held the dove in the other, creating a serene image that contrasted with the band’s electric performance. -source