CORRECTS DAY TO THURSDAY – FILE – A humpback whale dives off the coast of Port Stephens, Australia, on June 14, 2021. Lonely humpback whales are more likely to sing – but as populations grow, whales wail less, a new study released on Thursday, Feb. 16, 2023, suggests. (AP Photo/Mark Baker, File) 
CORRECTS DAY TO THURSDAY – FILE – A humpback whale breaches off the coast of Port Stephens, Australia, on June 14, 2021. Lonely humpback whales are more likely to sing – but as populations grow, whales wail less, a new study released on Thursday, Feb. 16, 2023, suggests. (AP Photo/Mark Baker, File)
Lonely tunes: Humpback whales wail less as population grows
