Hi, I have a buzzard sitting in the field next door to my house - it has been there at least half an hour, not sure when it first appeared. It’s standing normally and walking/running around but doesn’t seem inclined to fly. Despite the appearance of 4 magpies which it keeps trying to get away from! Not sure if it’s damaged and not sure if I can fo anything to help…!?
I'll echo what Hazy & Seaman have said, many birds will do that to buzzards and other predatory birds, for fear of them being victim to the raptors lunch and during the breeding season, to protect their families from predation.
Also if the buzzard was in a state of distress or poor health and weakening, other birds would continually pick at it as a means of shortening the buzzards condition.