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Researchers tested ravens they had raised themselves (“hand-raised”), starting at four months of age (not far from the egg…) and then at 8, 12, and 16 months of age on a series of cognitive skills, compared to chimpanzees: Comparing the cognitive performance of the ravens with those of 106 chimpanzees and 32 orangutans who completed similar tasks in a previous study, the authors found that with the exception of spatial memory, the cognitive performance of the ravens was very similar to those of orangutans and chimpanzees. Nature Publishing Group , “Cognitive performance of four-months-old ravens may parallel adult apes” at Phys.org Here’s the open-access study. The authors offer an explanation: The findings provide evidence that ravens, similarly to great apes, Read More ›