Witches have very poor eyesight…
… so they sometimes ‘borrow’ eyes from elsewhere, to improve their vision.
They have voracious appetites, and are partial to crabs and small children.
Witches can fly, which is an advantage when hunting down prey.
Though her eyes may be weak, a Witch has finely tuned olfactory sensors to help her track down victims.
Some have open cavities in the middles of their faces, to better scent food. They disguise these with prosthetic noses (attached with elastic bands) that they remove when hunting.
A Witch doesn’t use a toothbrush or dental-floss, and instead employs maggots to clean any meat stuck between her teeth. She keeps the maggots in ointment-pots in her capacious pockets. But the maggots are not regarded by her as pets. After they have done their work, the Witch eats them!
Witches are are very bad news indeed, and are best avoided.