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Only some animals are known to fathom object permanence – the idea that something still exists even when it's out of sight.) are one of the few with an advanced understanding, a new study confirms. It's a clever skill that comes in handy when nesting females seal themselves out of sight in tree hollows, relying on their mate to bring them food.
"From an evolutionary perspective, the ability to represent other animals and objects when they are out of sight provides great adaptive advantages in activities such as foraging and, no other birds were previously known to have object permanence to the same extent as primates. While other bird species have been tested, they only made it to stage four of the
At stage five, the birds watched a reward get placed under one cup, then moved to another cup. By indicating the cup that the treat ended up in, the birds demonstrated an understanding of visible displacement.
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