Came across an unusually large gathering of Starlings by the Newton Houses today. The flock must have been the majority if not all of the breeding population for Caerau and contained 115 birds. 34 of the birds were adult the rest juveniles. This equates to 17 pairs and 81 juveniles. Taking that this is a post spring breeding gathering, it would mean the success rate would be 4.76 juveniles per pair. Starlings usually lay between four and five eggs so that's a pretty good success rate.