The loud, agressive Blue Jays rank high in the pecking order. When they land on the feeding board, the other birds scurry to get out of their way.
They're a large bird, a little bigger than a robin. The male and female look alike.
Many years ago when we lived in town, one of our animals was trying to mouth a newly fledged jay in the back yard grass. The parents' noise bought DH and me to the rescue.
After pulling off the dog and getting it in the house, I went back out to see if the young jay was OK. When I bent over to look, one of the parents flew down and pecked my butt. A memory that still makes DH laugh while I pretend it wasn't funny.