Difference between Skulk and Sneak

I am wondering what are the differences between "skulk" and "sneak"?

I looked on oxford dictionary:

Skulk: "Keep out of sight, typically with a sinister or cowardly motive."

Sneak: "Move or go in a furtive or stealthy way."

They sound the same. Are they different at all? Some concrete examples would be appreciated.


As pointed out in your dictionary:

To sneak means to move in a certain manner.

To skulk means to hide in a certain manner.

Examples

John saw Mary sneaking through the bushes. (Mary is moving)

John saw Mary skulking in the bushes. (Mary is hiding)