Both adult beetles and their larvae have biting mouth parts. They can bite if you get them under your clothes or squeeze them. However, this rarely happens. The only Danish species, which bite humans on its own initiative, is the seven-spot ladybird, Coccinella septempunctata. Usually, this only happens, when the ladybirds are quite numerous and their natural food supply of aphids and scale insects run out. Some of the hungry beetles may want to try a sample of humans. Beetle bites usually do not have any after-effect because no poison, etc. is injected to the wound.
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