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Blue jays use a visual display such as puffing their wings up, flapping their tail-feathers, or wing spreading in order to make themselves appear larger and more formidable. They use this display to ward off potential predators as well as to show the member of the opposite sex how strong and healthy they are for a choice as a mate.

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9y ago
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Q: What does it mean when a blue jay makes it body puff up?
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