Welcome back to Trivia Waves, where we broadcast the most astonishing facts to spark your curiosity! Today, we’re flying into the animal kingdom with a fact that’ll make you think twice about crossing a bird: did you know crows can hold grudges against humans? Tune in as we explore this feathered feud.

Crows are among the smartest animals on the planet, with problem-solving skills that rival those of some primates. In a 2011 study at the University of Washington, researchers tested crows’ memory by capturing them while wearing a specific mask, then releasing them. Later, when the same mask was worn near the crows, they reacted with loud scolding calls and even dive-bombed the person—showing they remembered the “threat” years later. What’s more, crows taught other crows to recognize the mask, passing down their grudge to the flock.

This incredible behavior shows how crows use memory and social learning to protect themselves, making them one of nature’s most fascinating creatures. At Trivia Waves, we love sharing these wild animal stories that reveal the hidden smarts of the world around us, and we’ve got plenty more to broadcast.

Have you ever had a run-in with a clever animal? Drop us a line at contact@triviaradio.com—we’d love to hear from you! If you enjoyed this trivia, share it with your fellow fact fans and stay tuned for more waves of knowledge that’ll amaze you.