Although renowned for being talkative and boisterous, blue jays may also communicate through body language. The feathers on the Blue Jay’s head may look like a helmet, but little do most people know that those feathers are substantial regarding communication. Crests among the Blue Jays are used to indicate different feelings and plans they have. For instance, when a Blue Jay is relaxed or feels safe, its crest will be flattened against its head.
Nevertheless, if the particular bird is stressed, afraid, or stimulated, it is capable of lifting its crest, thus making the bird seem bigger and menacing. They are more aggressive the higher their crest. This signal is the key to maintaining interaction with the rest of the birds in that flock. The crest also aids them in expressing their feelings to anyone who might be an enemy, so they should stay clear. https://www.birdfy.com/blogs/blogs/10-fun-facts-about-blue-jays-the-clever-and-colorful-bird-of-north-america?srsltid=AfmBOoqhMR9TTJhYDIYkhRqsQYJ9T_FjdvHVJFBuUX4kXPHAFjub0OJm
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