I have 15x zoom and this was the best I could get. I seem to spot the mergansers at around 9 AM at the forks of the Thames. They stand out with their white bodies and they like to dive a lot, but they are never close by. If I go closer to the banks the geese get louder and closer to me and the merganser swims away. The geese and the mallards seem to locate people on the shore and swim closer hoping you are going to feed them. There are few things funnier than a Canadian goose's butt in the air :P
