The high tail means that the wolf is domonant, like the alpha male of female The stiff horazontal tail means the wolf is hunting, or is going to attack. A drooped tail means the wolf is relaxed.
A tail tucked between the legs means that the wolf is submissive.
This body position shows that the wolf is defensive, or feeling threatened. This one indicates that the wolf is running in fear.
The wolf on the left is an example of active submission
This wolf wants to play
The wolf on the right is an example of passive submission