Andrea Bonilla, a Colombian scientist at Cornell University in the United States, has been working with a team of researchers since 2014 to catalog humpback whales from a visual analysis of their tails—or flukes. Over the years, the team has identified 70 whales, and hopes to see some of them again to record any physical changes that could provide clues to their migratory patterns, population sizes, health and sexual maturity. On the tail, "the coloration and patterns that