Mick,
yes we do have them here they are very aggressive. They are one of the leading causes in the reduction of our native bluebirds here in the South

. Alot of people like to set up bluebird houses but when the sparrows move into them nobody wants to kill or remove the sparrow nest which in the end increases the sparrow population and the problem. But I guess you have to give them credit they are an industrious species I see them eating everything and are all over the place.
Keith