From the Super Mario Wiki
Urban Stingbies are mosquito-like creatures found in the Metro Kingdom of Super Mario Odyssey. Urban Stingbies bear little resemblance to their namesake bee-like counterparts outside of basic shape. They are normally found in alleyways in New Donk City, in their larval form. When they spot Mario, they morph into adulthood and charge him in a straight line; they are instantly defeated if they hit a wall. They also appear in the Darker Side, where they are always found in their adult form. Urban Stingbies cannot be captured.
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