Care for Magical Creatures Lesson 9.

Hello Class,
Today i would like to talk to you about an old creature in Wizardy and Muggle folklore. Can anyone describe to me what a Hag is, and what she looks like?

A hag is a wizened old woman, or a kind of fairy or goddess having the appearance of such a woman, often found in folklore

Hags, also called crones, are a savage sort of creatures that look like ugly old witches.
Hags can be encountered in Knockturn Alley or the Leaky Cauldron.
They are often malevolent, and some have shapeshifting skills, or at least maintain the illusion of shapeshifting.And I found a book in library which says more about them, and I even found that they have black eyes, green skin and green hair.
They are creepy :S