As I rounded the corner, I saw at least four gang-gangs call and land in a tree across the track. They then flew across the track to this old tree and a tree close by. Two females inspected hollows, the males stayed on branches. After a few minutes, one pair flew towards the area where the Cam/Tom/Isaac hollows are; another pair flew up the hill towards the road, so I'm wondering if there is something to look for up the track. This left one pair in the old tree.