Biology
The Role of Innovation in Urban Bird Foraging Behavior
Quick fact
Urban great tits and blue tits have learned to pierce the foil caps of milk bottles to drink the cream, a behavior that first appeared in the 1920s and spread rapidly across Britain and Europe without any genetic change—it's pure socially transmitted innovation.
Why this is interesting
You've probably seen a crow or a gull snatch a dropped french fry or even open a bin lid. But how do they know how to do that?