Your waist is the middle part of your body. Your belly button is on your waist. Belts go around your waist, and skirts and jeans fasten around your waist.
Many birds and animals that live near water have webbed feet. These creatures have skin stretching between their toes so their feet become little paddles and the animal becomes much better at swimming through the water. Animals with webbed feet include ducks, swans, geese, seagulls, platypuses, otters, turtles and many, many other birds and animals that can swim.
Whiskers are hairs that grow around the nose and mouth of most animals. On people, whiskers are usually called a beard or moustache. Animals use their whiskers to tell when they are near something, as the whisker hairs hit things before the animal's face does. Cats have the most well-known whiskers. The cat in the picture is yawning, and you can clearly see its whiskers.
Animals and insects with wings can fly. This means they can go over things without touching the ground, for much longer distances than if they just jumped over them.
An animal's withers is the highest point along their back, generally around their shoulders. Horse's height is measured from the ground to the top of their withers.