MUNISING, MICH. -- Hikers, take heed: Stable fly season is back at Pictured Rocks National Lakeshore. These biting flies have returned to the picturesque park in Michigan’s Upper Peninsula, and ...

Black flies are small, gnat-like insects that swarm and bite, causing itchy welts. Peak black fly season in Michigan is mid-May to mid-June, primarily in the Upper Peninsula and northern Lower ...