1.   Dogs are used to track the wolves to their lair in the forest.

2.   The dogs tracked the wolf to its lair.

3.   He thought he had better track this wolf and kill it.

4.   Having failed to track wolves on mountain slopes, Promberger asked a Romanian shepherd for guidance.

5.   However, Armistead said, the wolves have been tracked by radio to within four miles of the ranch.

6.   She said she was told that the man then tracked the wolf down and killed it.

7.   Those wolves were being tracked by radio signal, which showed that they remained in the vicinity of their enclosure.