Whenever they feel the need to communicate. They sing for a variety of reasons, but their singing isn't the same as a human singing; We simply refer to their communication as singing.
they can sing for 80 hours!
they sing because that is how they have conversations.
Whales "sing" to talk to each other. Their song can carry for vast distances underwater. ( by sonic waves )
The cast of Where the Whales Have Ceased to Sing - 1993 includes: Josefin Nilsson
Yes, female humpback whales do sing as part of their communication and social behavior.
yes
to communicate and find other whales like wolves but wolves do it to find there pack and whales do it to find there school or pod
Yes sometimes
hang upside down in the water
whales use echolocation to find each other and birds... i think to attract mates.
Humpback whales sing to communicate with each other, attract mates, and navigate their environment. Their songs can be complex and are thought to play a role in their social interactions and breeding behavior.
It is still a mystery to why humpback whales sing. One theory is that it could attract a possible mate. IT IS CERTAINLY A MYSTERY ON WHAT THEY SING ABOUT!