Sorry about your loss and welcome to the forum.  I have regularly had pigeons circle my MP in formation and have been hassled by sea gulls.  Pigeons Ave always stayed away, I have some rapid fly past video.  But the gulls are more aggressive. 
As another poster said stop , turn in sports mode and ascend rapidly.  Birds can’t do that so you can’t be a bird. They tend to fly away.  Only failed once with a very large flock of sea gulls in a river area near the coast.  I got a couple of good picks of a bridge but quickly landed.  
I have read posts here about hawkes too.