Galahs and Grass Parrots

When I took this photo I thought I'd caught two galahs (the pink and grey birds) and two grass parrots. When I looked closer, I realised that I'd caught two pairs of grass parrots. I knew galahs paired for life, it appears that grass parrots also do this. Since I took this photo, every bright male grass parrot I've seen has been accompanied by his (usually almost invisible) mate.

... I took this on a Sunday morning, near 'Luther Square' in Gawler.