The male is the one on the left with the chipped lower mandible; the female is on the right. It looks like she was being given a cicada larva. This pair has already mated and dug a nest hole, yet it seems they still do courtship feeding. ^^

An individual I'd been struggling to get a shot of. Once again missed the pair….

This female is the one I've photographed most. The white streaking on the head is distinctive. Shot her endlessly last year too. ^^