Whale songs identify where they come from

Paul Fletcher shares this today on Facebook: https://www.newscientist.com/article/2215121-we-can-tell-where-a-whale-has-travelled-from-the-themes-in-its-song/?fbclid=IwAR1zBr70Otl0O5flFTJCwk5opJviQA4mPAvUQZyunoXLgI2xMigJkxzUskU