It's happened before, it'll happen again:

In fact, I have a bird on my head several times most days. When we're in the office (me at the computer, Peanut on the perch of his play gym) Peanut lets me know he's ready to go by fidgeting, stretching up on his toes, fidgeting again, and finally, flying onto my head. That's what happened here, although he was happy enough to stay on my head while I went into the living room, got the camera, and took a few pictures. He's happy to stay on my head most times he flies there; Bruce calls me Peanut's bus driver.