The Silver Brumby S03 E13 The Final Encounter

Boon Boon angers her father when she tells him she intends to choose Thowra as a partner and the Brolga immediately issues a challenge to Thowra. The Prospector is leaving the high country to move south to live with his son and grandson Charlie. Thowra defeats the Brolga, claims his title as King of the Cascade Brumbies, and banished the Brolga from the High Country.