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https://greennature.com/paper-wasps/

Another very wide ranging species, the Northern Paper Wasp, lives everywhere east of the Rocky Mountains.

If researchers are on the right course, Northern Paper Wasps might all be able to recognize each other. According to a 2011 study called Specialized Face Learning Is Associated with Individual Recognition in Paper Wasps

Polistes fuscatus can differentiate among normal wasp face images more rapidly and accurately than nonface images or manipulated faces. A close relative lacking facial recognition, Polistes metricus, however, lacks specialized face learning. Similar specializations for face learning are found in primates and other mammals, although P. fuscatus represents an independent evolution of specialization.

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2nd wasp showing it's face around stinger end of front wasp. You know it if stung by one of them.

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