As I watched, the falcon did a wing-over and went into a dive. He swooped low and fast over the neighbour's yard, cleared the fence and came lower and faster over my back yard. The peewees let out their diverse alarums but the falcon wasn't after them. He pulled up right under the bottle-brush tree and crashed through the outer branches, sending the flock of sparrows hiding in there scattering all over the place. The falcon tore through the tree and out the top, performed a negative-g dive over the top of the tree, and scooped up a sparrow who had broken cover at the wrong moment.
I've hung a blanket in front of the peewees so they can't be freaked out by the predator. Poor little maniacs are flighty enough as it is.