I am pretty sure that the African loon has a green head and a white body.
1. The black and white crested grebe. 2. The black and white water tern.
Red head and black body bird
They have red and black head, white neck, white body, black and white wings, and orange feet.
The most likely duck species fitting that description in northwest Idaho is the Common Goldeneye. They have a white body with a black head and neck. Common Goldeneyes are diving ducks often found in freshwater lakes and ponds in the region.
A male mallard in breeding plumage. There is no wild duck with a green head and a black body. Mallard drakes have the green head, but the body is bascically buff and brown, with white and a blue or lavender speculum patch on the wing, with a dark brown or chestnut colored chest. The bird you saw may be one of many hybrid species, as for example I have seen seen domestic ducks that have bred with mallards to produce many different colors, including basic black birds. In exotic species, male Indian runners and crested cayuga ducks are black with green heads, and are allied to mallards. But no North American species.
Here. Type in "xeme." The bird has a black head and a white body. The tips of its wings are black.
Homonyms of "duck" include: Duck (the bird) - Example: Look at that duck swimming in the pond. Duck (to lower one's head or body quickly to avoid something) - Example: I had to duck to avoid hitting my head on the low ceiling.
Some homonyms of "duck" are: 1) duck - the bird; 2) duck - to lower your head or body quickly to avoid something; 3) duck - a type of fabric.
Downey woodpecker
could be ptarmigan
Without more information, this is difficult to answer. It could be a ferruginous duck, or possibly a red crested pochard.