Crows and ravens are hard to tell apart, but basically, the common raven is bigger than the American and Northwestern crow. So you might think that ravens would win in a fight. But that doesn’t seem to be the case.
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New research shows that ravens can plan ahead for different types of events, and even resist the urge to take an immediate reward in favour of getting a better one in the future. These capacities are often considered the exclusive domain of humans and great apes, so their presence in birds comes as a surprise.