Taking a stroll down Western Avenue in the village of Glen Arbor, you’ll come to a lawn that is beautifully landscaped in Michigan native plants. This is 6391 Western Avenue, the headquarters of Sleeping Bear Birding Trail (SBBT). What, you wonder, is a birding trail? That’s the most frequently asked question by both tourists and locals coming through the door, said operations director Mick Seymour. “What the heck is a birding trail?”