Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The 15-20 species of small passerine birds in the gnatcatcher family occur in North and South America (except far south and high Andean regions). Most species of this mainly tropical and subtropical group are resident, but the Blue-gray Gnatcatcher of the USA and southern Canada migrates south in winter. They are close relatives of the wrens.

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