Source: 20 years on, first two humpback whales recorded by Irish group are still swimming together
Source: Scientists Record an Extremely Intimate Look at How Dolphins Get It On | Mental Floss
Source: Migrating humpbacks ‘cover’ whale songs, scientists learn | Stuff.co.nz
Source: Whale Songs Are Getting Deeper – The Atlantic
Source: Found: A Hub Where Humpback Whales Share Their Songs | Smart News | Smithsonian
Among Whales and Dolphins - Drake Bay, Costa Rica Dismiss