Western Australia is to protect and manage a key nursery of the world’s largest humpback whales. The marine park will be at Camden Sound, 400km north of Broome, which is said to be the biggest calving area for humpback whales in the southern hemisphere. More than 1,000 are found in the ‘maternity ward’ during calving season. Humpbacks are protected from whaling in the southern hemisphere since 1963, when numbers in Western Australia fell below 1,000. Their numbers are recovering at 10% each year.