Duck Anatomy Explorer: Tap a Part, Learn What It Does

What the explorer shows

Fifteen parts of a duck, from the nail on the tip of the bill to the web between the toes, each with the one thing worth knowing about it and a link to the article that tells the rest. The drawing is a plain side view of a generic dabbling duck — the shape of a mallard, a Pekin or a Campbell — rather than any one breed, and the facts are the ones that hold across breeds. Every panel names its sources at the bottom, and they are published studies, universities and extension services, the Cornell Lab, welfare codes and, for telling drakes from ducks, a waterfowl hatchery.

The parts are grouped the way you would meet them looking at a real duck: the head first (bill, lamellae, nostrils, eye, ear), then the body (neck, feathers, wing, speculum, preen gland, tail), then the legs and feet, and finally the down that a duckling is born with. One of the fifteen is not strictly a part at all: “half a brain awake” is a thing the brain does rather than a place, and it earned its number because it is the fact most people find hardest to believe.

Five things the drawing cannot show

The interesting anatomy of a duck is mostly invisible from the outside, which is why each panel is more than a label. The lamellae along the bill are a strainer, not teeth, and the reason ducks do not have teeth is the same reason no bird does. The feathers keep water out mainly by their structure, and the preen oil’s main job is to keep that structure in order — International Bird Rescue calls the idea that the oil itself makes feathers waterproof “a common myth”, and why ducks don’t get wet sets out the evidence on both sides. Inside each leg, arteries and veins run side by side and exchange some heat, and, probably, less blood is sent down to the foot in the first place: the foot runs cold and loses little heat, and on ice it stays just above freezing — more on why ducks’ feet do not freeze. The eye has four kinds of colour cone to our three, the shortest tuned to violet rather than ultraviolet, which is the honest version of the claim that ducks see better than we do. And one half of the brain can sleep while the other watches, with the eye on the waking side open — the experiments behind how ducks sleep showed that birds can detect approaching predators while half asleep.

Male and female

The drawing shows a drake, because the curled tail feather is the easiest external difference to draw. On a female the tail is plain, the voice is the loud quack, and in mallard-pattern breeds the plumage is mottled brown. The explorer’s tail panel covers the drake feather; for the full set of signs and the ages they appear at, male vs female ducks and the sexing tool go further.

For classrooms

The explorer works without a mouse: every marker can be reached with the Tab key and opened with Enter, and the “next part” button walks through all fifteen in order, which makes it usable on a projector. The facts are short enough to read aloud. If you want a version to colour, the colouring pages use the same drawing, and the duck FAQ answers the questions that usually come up next.