We have a big blue heron nesting site close to me. It's called a blue heron rookery...I know about the rooks in Britain and the rook rifles they use to have there...
Maybe it's just the Yanks screwing up the Queens english, lol
Date: 1725 1 a : the nests or breeding place of a colony of rooks; also : a colony of rooks b : a breeding ground or haunt especially of gregarious birds or mammals; also : a colony of such birds or mammals 2 : a crowded dilapidated tenement or group of dwellings 3 : a place teeming with like individuals
It seems westy that you have a point there. You have your own English now ours is screwed up enough we don't need any help.