There were a pair of Black Swans with five cygnets. They were swimming at the southern end of the eastern pond. They all appeared to be feeding on weeds that were just below the water surface. The cygnets did not appear to be concerned about anything except eating. The older swans were also eating but generally seemed to be on either side of the cygnets keeping other birdlife away. Even though I was a short distance from them, the adult swans silently, almost imperceptibly, guided the cygnets away from me. There were no calls just a gradual movement away from where I was standing.