Ducks, Geese, Swans
Mallard Duck
There are many kinds of wild ducks, and even more types of domesticated ducks, but the Mallard is a good representative of all. Ducks are harmless. Bring some bread along, I never met a duck that didn't expect to be fed.
-- Wikipedia
Canada Goose
Canada Geese are extremely common. Although not native to the area, a large population has long-ago stopped migrating and become resident. Most of the time, they will retreat from your approach, but if they have young it is best to avoid them, or you might get a nasty surprise.
-- Wikipedia
Brant
Brants are very similar to Canada Geese, but smaller - intermediate in size between a goose and a duck. At times there can be a great many of them around, as they pass through in migration. Other times there are none. They have a much stronger affinity for saltwater than the other birds on this page.
-- Wikipedia
Mute Swan
Swans are beautiful to watch, but do so from a respectful distance. Swans are large and strong, and can be quite aggressive, especially when they are protecting their young. Of all the birds you will find while out kayaking, this is the only one that is likely to attack you, and if it does, you will lose. A pair of swans will clear a small body of water entirely of all other waterfowl - that is the reason they were introduced around the world. Swans are perfectly capable of flying, but you'll seldom see them do it - they'd rather stand their ground and fight.
If a Swan ruffles-up it's feathers like the one above, back away! He is not afraid of you!
-- Wikipedia