I visited a local quarry this afternoon to check on the Peregrines and Ravens. There was clearly something bothering the Peregrines when I arrived as both birds were calling loudly. I soon saw why, a first summer female Peregrine was also flying round in the quarry. As the youngster circled the adult female fly up from below her, twisted over and grabbed the youngster. They span round whilst the adult clutched the youngster with both birds calling loudly. The adult let go after about 20 seconds and the youngster flew rapidly away whilst the adult returned to the quarry face.