The heron was found again this morning at around 8.50am. It was observed for a good while feeding in the open in front of the reeds to the north of the north lagoon. When I arrived at ten past it was preening just inside them:
At around half past its head stopped appearing - it did not fly but simply disappeared. Presumably asleep or walked off into the reeds again. Reserve open 'til dusk tonight again. No news yet on the scaup - but eyes have all been on herons.