What do you do when you see a wolf?

Do not enter the enclosure or toss things into the zoo habitat.

The odds of you seeing a wolf in the wild, unless you give up living in the modern world and move to the wilderness, is nearly zero. On the extremely off chance you should see a wolf somehow in the wild, it is not going to last long and you need not do much at all; the wolf will run as soon as he sees you. That is unless you do something incredibly foolish like run toward the wolf and any potential young that might be present do not have time to avoid you. But, then the odds of you seeing wolf pups is less than seeing a live wolf in the wild.

In short, stand where you are and count yourself lucky.