For the first time I saw three Dollarbirds, including a juvenile, on the northern facing aspect of Red Hill. One adult was in a tree by itself while the juvenile and the other adult were in the same tree. The adult in the same tree as the juvenile was making a near continuous call, while the other adult was only calling sporadically. The juvenile was calling, but almost inaudibly from where I was. It was a different call to that of the adult, higher pitched, and almost continuously rolling notes. There was no interaction between the three. I had a look for a hollow but I could not see anything with my binoculars. I do not think there is a hollow on this side of the hill, I think they have flown here from somewhere else, as I was around this area for a while and I only heard their calling later in my walk, leading me to believe they had only just arrived.