06/11/2026
We had one sighting of a SRW this season. A single adult heading north….
🐋 The journey south: a new chapter for southern right whale mothers and calves
By late October and early November, our sheltered coastal bays begin to quieten. The winter calving and mating season is drawing to a close, and southern right whale mothers and their young are preparing for their long journey south. 🌊
But this migration is more than a change of scenery. It is an extraordinary energetic challenge.
🐋 Mothers running on reserves
Southern right whales are capital breeders: mothers rely largely on energy stored in their blubber to sustain themselves and produce milk throughout the nursing season. By the end of this period, they can have lost a substantial proportion of their body reserves.
🌊 A demanding journey for calves
For calves only a few months old, the journey to their summer feeding grounds in the Southern Ocean means:
Endurance: keeping pace over thousands of kilometres of open ocean.
Survival: navigating unfamiliar offshore waters and potential predators.
Learning: developing the movement patterns and navigational skills they will need in future migrations.
❄️ Why does this matter?
The success of this journey depends on what happens next. Mothers need to reach productive feeding grounds to rebuild their energy reserves and prepare for future reproduction. Changes in ocean conditions and prey availability can affect how quickly they recover and when they are ready to calve again.
That is why our long-term monitoring of southern right whales is so important. By tracking population trends, calf production and body condition, we can better understand how these whales are responding to a changing Southern Ocean.
The journey south is not the end of the story. It is the beginning of the next chapter in the lives of these whales. 💙
University of Pretoria Faculty of Natural and Agricultural Sciences, University of Pretoria Department of Zoology and Entomology, University of Pretoria