This video is called Ducks, Coots and Geese at the Park:
Tufted ducks (black and white)
Pochard (grey back and a red head)
Mallard (green head)
Canada geese (black necks and heads with white stripe. Weird looking ones are hybrids)
Coot (black with white, pointed beak).
Today in the nature reserve.
In the castle pond, a female tufted duck swimming.
In the canal between the reserve and the meadow to the east, an adult and a young great crested grebe; coots; mallards.
Behind them, a barn swallow flying.
A red admiral; and a speckled wood butterfly.