Harriet Tubman was a heroic abolitionist in the cause to end chattel slavery. She was also an excellent astronomer and naturalist — and an expert birder. She mastered the hoot of the Barred Owl, using it as a signal throughout the Underground Railroad to let freedom seekers know she had arrived.

More info and transcript at BirdNote.org. 

Want more BirdNote? Subscribe to our weekly newsletter. Sign up for BirdNote+ to get ad-free listening and other perks. 

BirdNote is a nonprofit. Your tax-deductible gift makes these shows possible.