Whales may hone their singing skills by practising out of season

The songs of male humpback whales seem to become more complex in the months before they look for a mate, suggesting a rehearsal period may be important for good performance

​The songs of male humpback whales seem to become more complex in the months before they look for a mate, suggesting a rehearsal period may be important for good performance The songs of male humpback whales seem to become more complex in the months before they look for a mate, suggesting a rehearsal period may be important for good performance