A whale’s journey

Two humpback whales were sighted off our Cape Cruise on this cold still morning! We are getting excited about seeing these giants more and more as their migration progresses.

It is well known that southern humpback whales migrate from Antarctica to warmer waters to breed. Whilst humpbacks have been studied for many years, there are still mysteries surrounding their incredible annual journey. Do they always follow the same route? Where are the calves born? Do they have a mid-migratory stop or snack?

The whales’ migration from the krill-rich Antarctic waters starts in late autumn and lasts till late spring. Research and observations of whales along the coast of Australia show that most mature whales spend their winter-break in sheltered bays off Queensland before returning south.

The first age group to embark on this impressive 7 to 8 thousand km retour journey is the young and sexually mature whale, who will be looking for a mate. Males and non-pregnant females lead the way, leaving pregnant females to stay and feed in Antarctica as long as possible. This ensures that mum will be at her fittest to support a growing calf! Interestingly, mums and calves are also last to return south, so that their calves are big and strong enough to endure their first journey to Antarctica.

Fascinating fact: Pregnant females and mums are usually escorted by one or two adult whales; escorts can be male or female, and help protect the vulnerable ones from any dangers.

In recent years, more calves have been born mid-migration. Whether they have as much chance to survive as their friends born in the tropical waters is unknown.

More mid-migratory feeding behaviour has also been recorded, with subadult humpback whales seen feeding on bait fish of Wilsons Prom and Phillip Island!

Whales may be adapting to changes in climate, food distribution, and growing population. By studying their migratory behaviour we keep on learning about these fascinating giants, and how we can best protect them.

Join us on a whale cruise this winter to witness and learn more about humpback whales!