Crows can remember the face of their captors—even after generations.
Do Birds Remember Faces?
Published December 13, 2017
Onscreen : Can birds remember faces?
John Marzluff : When we first captured birds we were wearing this mask. So the birds that were immobile under a net saw this person coming to them, grabbing them, stretching their wings out to measure them, applying rings to their legs to identify them, and then letting them go.
Onscreen : Crows don’t like being caught, even when they’re unharmed. The question was…would they remember that the masked man was a threat?
A few days after the initial tagging, Marzluff walked across the campus again. He kept the mask on, but he left the crows alone, to see if he’d get any response.
Marzluff : It was very striking. The first time after we did this experiment, and we walked with the caveman mask, the birds immediately responded to that. They scolded with harsh calls that are indicative of a predator. And they gathered around us. They attracted others in. And they would even dive down at us.
Onscreen : Marzluff discovered that the crows were somehow telling each other that the person in the caveman mask was dangerous.
What’s more amazing…the team never again caught crows with the mask on, but that reaction has been passed down through several generations.
Marzluff : It’s been 11 years since we caught seven birds on our campus with this mask. And nearly half of all the birds we encounter on a given day respond strongly two that face. Even though they weren’t even born at the time we first did our capture. The only experience they have with that caveman is hearsay.
- Digital Producer
- Ana Aceves
- BIRD BRAIN
- PRODUCED FOR NOVA BY
- Elizabeth Arledge
- Bill McMillin
- Mark Iler
- Jedd Ehrmann