Before migrating, some blue whales switch up the timing of their songs
The world’s largest animal goes from nighttime to daytime crooning before heading south
![blue whale](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/10/093020_JB_whale-song_feat.jpg?fit=1028%2C579&ssl=1)
A blue whale (Balaenoptera musculus) breaches the surface of Monterey Bay, California. Blue whales in the bay have recently been observed changing their singing schedule before migrating south.
Anthony Pierce/Alamy Stock Photo