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See Inside Scientific American Volume 310, Issue 2

The Startling Intelligence of the Common Chicken

Chickens are smart, and they understand their world, which raises troubling questions about how they are treated on factory farms

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In the animal kingdom, some creatures are smarter than others. Birds, in particular, exhibit many remarkable skills once thought to be restricted to humans: Magpies recognize their reflection in a mirror. New Caledonian crows construct tools and learn these skills from their elders. African grey parrots can count, categorize objects by color and shape, and learn to understand human words. And a sulfur-crested cockatoo named Snowball can dance to a beat.

Few people think about the chicken as intelligent, however. In recent years, though, scientists have learned that this bird can be deceptive and cunning, that it possesses communication skills on par with those of some primates and that it uses sophisticated signals to convey its intentions. When making decisions, the chicken takes into account its own prior experience and knowledge surrounding the situation. It can solve complex problems and empathizes with individuals that are in danger.

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