ravens Animals 

Ravens Cooperate, but Not with Cheaters!

By Kate Stone Several recent studies have revealed that ravens are among the most intelligent species of birds and even species in general. Now, cognitive biologists from the University of Vienna add teamwork, cooperation, and avoidance of cheaters to the ravens’ already lengthy list of skills. “From the wild, it was already known that ravens are able to cooperate when, for example, mobbing predators. But using an experimental set-up working with captive ravens now allowed us to investigate how exactly they do so,” says Jorg Massen. In Massen’s experiment, two…

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