Answer: The most commonly encountered earwig in American gardens is Forficula auricularia, the European Earwig. The earliest reference I can find to the pest is 1920 (W.S. Blatchley in the book Orthoptera of Northeastern America). It appears that the European Earwig, once introduced from Europe, migrated from the Atlantic Coast and is currently a common pest throughout gardens in the U.S. and Eastern Canada. There is a natural predator (Bigonicheta spinipennis) called a tachinid fly which has been introduced from Europe to help control this pest.
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