"Mating and territory fighting is a regular occurrence during this time of season, and their sounds are terrifying!" she said. "I felt so sorry for this poor bubba, it was heartbreaking to watch and so hard to not to go comfort it, I try not to interfere where possible."
Fortunately, this particular koala got a happy ending: Alexander reports that the little koala eventually won, and had safely ensconced him- or herself in the tree by nightfall.
Be sure to watch the video above to hear the sad cries - they're guaranteed to be unlike anything you've ever heard. For more strange koala noises, click here.