At 9:00 am this morning Oct. 5/20 Margaret Liubavicius spotted an adult Slaty-backed Gull standing on a rock about 100 feet off the west side of Gibraltar Point, just north of the washroom. We, Bob Tyler, Margaret and myself had great views of this gull and watched it for about 10 minutes. We then carried on birding but about 20 minutes later we returned to look at it again but it had disappeared. It probably joined one of the three large feeding flocks of Ring-billed and Herring Gulls about 1000 feet out on and over the lake. This bird maybe (probably is) the same bird seen by many west of the islands lately. Norm Murr Richmond Hill, ON