Here's a surprise: Wild crows can recognize individual people. They can pick a person out of a crowd, follow them, and remember them — apparently for years. But people — even people who love crows — usually can't tell them apart. So what we have for you are two experiments that tell this story.
First, how do crows tell us apart? Watch this video:
Now, our second experiment. On you.
![Crows have this uncanny ability to tell one human from another. And they'll hold a grudge if you do them wrong. But can you tell one crow from another?](https://cdn.kpbs.org/dims4/default/d478fb1/2147483647/strip/true/crop/570x351+27+0/resize/880x542!/quality/90/?url=https%3A%2F%2Fmedia.npr.org%2Fnews%2Fspecials%2F2009%2Fcrow-game%2Fpromos%2Fcrowgame_16x9-391d136a65e90f50c2a3b6c823950146c71501ca.jpg)
There are crow scholars who raise, study, and even live with a crow. But once that crow flies off and joins a group, these researchers say they can no longer tell their crow apart from the others.
If you want to hear researchers describe what it's like to alienate a crow, and then be razzed and harassed by its family and neighbors wherever they go — tennis courts, ATM machines, parking lots — listen to our radio story. We'll also tell you how unbelievably long a crow can keep a grudge.
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