Ol' blue fins

Scientists have discovered that whales croon for love.

A team of researchers from the University of Queensland has found proof that male humpback whales spend many hours "singing" in a bid to woo potential partners.

Researchers have for three years tracked and recorded whales during the annual migration season off Peregian Beach, on Queensland's Sunshine Coast, in September and October. They said the songs, which can last up to 23 hours, mainly involve chirps.