Millicent Ficken spent her career studying bird behavior and communication. The first woman to earn a PhD in Ecology and Evolutionary Biology from Cornell in 1960, Ficken authored over 100 scientific papers. She discovered that male hummingbirds have a whole repertoire of songs rather than just one, outlined the linguistic differences between penguin species, and showed that chickadees take turns singing in the morning. She was especially fascinated by how birds play, showing that bird play almost always has a pressing purpose — they're practicing a skill they need to survive.

More info and transcript at BirdNote.org. 

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