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Peacocks will attack their reflections. In the side of your new car, for example :( So they presumably think that they're other peacocks.

There's a video of a large mirror placed in a jungle and the reaction of various animals. https://www.youtube.com/watch?v=GaMylwohL14

Also previously on HN this same topic was discussed https://news.ycombinator.com/item?id=7751593

Or they may disagree with your choice of brand.

Or jealousy with its looks.