How to distinguish geese from ducks?

Mainly from the following aspects to distinguish (the first picture is a goose, the second picture is a duck):

First, the difference in appearance.

(1) Goose has an orange-yellow or dark brown fleshy protrusion on its forehead, a long neck, a flat and wide mouth, webbed legs and short toes, and white or gray feathers.

(2) Duck, with flat mouth and short legs, webbed toes, is good at swimming and can't fly high.

Second, the difference in body shape.

(1) Goose is usually fatter.

(2) In contrast, ducks are thinner.

Third, the difference between calls.

(1) Goose and duck have similar calls.

(2) But the harsh voice of a goose is different from the caution of a duck.

Fourth, the difference in courage.

(1) Ducks are afraid of people. As soon as people come near, they will give in and run away.

But the goose stood proudly.

Fifth, the pace is different.

(1) Goose has a leisurely pace.

(2) The duck's pace is fast, and he is embarrassed.