Small canals are already frozen. However, today there is no ice on the river Rhine yet.
If the frost continues, the river will freeze; with only a few spots of water kept open by swimming birds.
Today, a great cormorant, a mute swan, and mallards. A herring gull sitting on a bridge.
This video says about itself:
A black swan and a mute swan both shake their wings out one after the other, conviniently illustrating the difference between the species. Filmed in Cambridge.